@article{martin_shipman_2023, title={Deep Dive into Eutectics: On the Origin of Deep and Elevated Eutectics}, volume={170}, ISSN={["1945-7111"]}, url={https://doi.org/10.1149/1945-7111/acdd27}, DOI={10.1149/1945-7111/acdd27}, abstractNote={There is growing interest in deep eutectic solvents (DES) for both chemical synthesis and materials applications. However, there is a general lack of understanding regarding what uniquely defines a system as a deep eutectic, and more importantly, what chemical properties determine unique eutectic behavior. In this work, we identify the thermodynamic basis for ideal eutectics relative to assumptions of ideal solutions. We then articulate the new Solvation Shell-Ionic Liquid (SSIL) and -Liquid Solvate (SSLS) model for solutions which identify the chemical/physical factors that create solution non-ideality and afford the ability to accurately calculate liquiduses, and thus the eutectics, of binary systems. The application of these models is demonstrated using diverse families of materials including aqueous salt solutions (ZnCl2, NaCl, KCl, and NH4NO3), aqueous molecular solutions (sucrose and urea), solutions of naphthalene with aromatic (toluene, benzene, toluene, biphenyl and phenanthrene) and non-aromatic (ethanol, butanol, heptane and acetone) solvents, and the choline chloride:urea system for which the term DES was first introduced. The accurate description of the non-ideal enthalpic and entropic terms affords clear definition and prediction of both deep and elevated eutectics in diverse systems.}, number={6}, journal={JOURNAL OF THE ELECTROCHEMICAL SOCIETY}, author={Martin, James D. D. and Shipman, Angela M. M.}, year={2023}, month={Jun} } @article{schmidt_neder_martin_minelli_lemee_goodwin_2023, title={Direct interpretation of the X-ray and neutron three-dimensional difference pair distribution functions (3D-DPDFs) of yttria-stabilized zirconia}, volume={79}, ISSN={2052-5206}, DOI={10.1107/S205252062300121X}, abstractNote={Three-dimensional difference pair distribution functions (3D-ΔPDFs) from X-ray and neutron diffraction experiments are reported for yttria-stabilized zirconia (Zr0.82Y0.18O1.91). A quantitative analysis of the signatures in the three-dimensional difference pair distribution functions is used to establish that oxygen ions neighbouring a vacancy shift by 0.525 (5) Å along 〈1, 0, 0〉 towards the vacancy while metal ions neighbouring a vacancy shift by 0.465 (2) Å along 〈1, 1, 1〉 away from the vacancy. The neutron 3D-ΔPDF shows a tendency for vacancies to cluster along 〈½, ½, ½〉, which results in sixfold coordinated metal ions.}, journal={ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS}, author={Schmidt, Ella Mara and Neder, Reinhard B. and Martin, James D. and Minelli, Arianna and Lemee, Marie-Helene and Goodwin, Andrew L.}, year={2023}, month={Apr}, pages={138–147} } @article{martin_2023, title={Water under the influence of solutes: On the non-innocence of a universal solvent}, volume={6}, ISSN={["2590-2385"]}, DOI={10.1016/j.matt.2023.03.020}, abstractNote={Water interactions with materials can dramatically change their properties, but the solute material also changes the properties of water. Here, a Solvation Shell-Liquid Solvate (SSLS) model is presented that provides a molecular-based description of water interacting with sucrose and cellulose for which multiple types of water are identified. Bound water most significantly changes the specific material’s properties, whereas the hard-to-remove water, i.e., water that is significantly modified by the influence of the solute, is responsible for bulk properties such as the system’s liquidus. Both types of water are significantly distinct from classical descriptions that treat solvents as an inert medium. This model provides the molecular basis for the insights into the molecular architecture of water-cellulose networks described in this issue of Matter and further provides a framework that can generally be applied to diverse aqueous systems. Water interactions with materials can dramatically change their properties, but the solute material also changes the properties of water. Here, a Solvation Shell-Liquid Solvate (SSLS) model is presented that provides a molecular-based description of water interacting with sucrose and cellulose for which multiple types of water are identified. Bound water most significantly changes the specific material’s properties, whereas the hard-to-remove water, i.e., water that is significantly modified by the influence of the solute, is responsible for bulk properties such as the system’s liquidus. Both types of water are significantly distinct from classical descriptions that treat solvents as an inert medium. This model provides the molecular basis for the insights into the molecular architecture of water-cellulose networks described in this issue of Matter and further provides a framework that can generally be applied to diverse aqueous systems. Computational and experimental insights into the molecular architecture of water-cellulose networksSalem et al.MatterMay 03, 2023In BriefA depiction of water-cellulose interactions as leveraged by hydroxyls is represented that govern “stacking” upon which subsequent chemical reactivity and physical properties are predicated. The nature of water states within stacking (e.g., one state is HR = hard-to-remove) dictates non-intuitive reactivity but can be invoked and applied to explain and control observables for cellulosic-based paper properties. For example, cellulosic fiber collapse from water removal is dependent on the quantity of HR states of water within the cellulose polymer units of the fiber. Full-Text PDF}, number={5}, journal={MATTER}, author={Martin, James D.}, year={2023}, month={May}, pages={1316–1319} } @article{shipman_martin_2022, title={Differentiating the Structure and Dynamics of Solute-Bound Vs. Bulk Water in Deep-Eutectic Aqueous AlCl3 Solutions}, url={https://doi.org/10.1149/MA2022-02552114mtgabs}, DOI={10.1149/MA2022-02552114mtgabs}, abstractNote={ Aqueous solutions of aluminum chloride exhibit a deep eutectic (-52˚C) that is likely due to solute-directed formation of complex network structures in the solvent. It is well known that the solute-bound solvent must have a distinct chemical environment from that of the bulk solvent. Commonly used vibrational spectroscopic measurements of aqueous salt solutions are not selective enough to directly identify distinct water environments in solution. However, variable-temperature 1H-NMR spectroscopy of aqueous solutions, specifically those with high charge density salts, can distinguish water directly bound to the cation from water of the bulk solution. This unique ability to resolve characteristic water peaks by NMR spectroscopy affords the opportunity to explore the hydration structure and dynamics of deep-eutectic aqueous solutions. The aqueous AlCl3 system is an excellent model to study solution structure since we can exploit the high charge density of the ions for which strong ion-dipole interactions are structure-directing to the solvent waters, allowing resolution of distinct water chemical environments. We conducted a thorough investigation of the composition- and temperature-dependent solution structure of the AlCl3 : water system using 1H-NMR spectroscopy, and X-ray and neutron diffraction. The room-temperature proton chemical shift of water proceeds downfield with increasing salt concentration until AlCl3•22H2O, the eutectic composition, after which further increasing concentration results in an upfield chemical shift (see Figure.) Using VT-NMR, we can resolve the first-nearest neighbor water signals from the bulk signal upon cooling. 1H-NMR T1 and T2 relaxation measurement of the distinct water environments reveal stark differences in proton mobility for compositions on the water-rich versus AlCl3-rich sides of the eutectic, implying significant changes in hydration structure. To evaluate the extent to which these changes are structural, a parallel set of composition- and temperature-dependent neutron and X-ray diffraction experiments demonstrate that both cations and anions exhibit significant structure-directing influences on the solution, which we hypothesize underlies deep eutectic behavior in aqueous solutions.}, journal={ECS Meeting Abstracts}, author={Shipman, Angela Marie and Martin, James D}, year={2022}, month={Oct} } @article{martin_boyd_2022, title={To Freeze or Not to Freeze: Questioning the Origin of the Deep Eutectic in the Zinc Chloride Hydrate System}, url={https://doi.org/10.1149/MA2022-02552115mtgabs}, DOI={10.1149/MA2022-02552115mtgabs}, abstractNote={ Zinc chloride is one of the most soluble salts in aqueous solutions, with an ambient temperature solubility of over 430 g per 100 g of water (ZnCl2·R H2O, R = 1.8). It also exhibits a deep eutectic, at R = 7.25 and -60 °C between pure water and the most water-rich crystalline hydrate, R = 4.5 (see Figure). We previously demonstrated that the molecular ions of the crystalline R = 3 hydrate persist into the melt (Tm = 5 °C) resulting in the ionic liquid [Zn(OH2)6][ZnCl4]. Results from an extensive series of Raman spectroscopy and synchrotron diffraction measurements will be shown to demonstrate that the [ZnCl4]2- anion persists to high dilution. These data further provide evidence for a complex hydration structure beyond the first neighbor water of the hexaaquo zinc cation. Notably the complex speciation/hydration structure directly correlates with the concentration-dependent differential scanning calorimetry of this system and will be shown to be the origin of the system’s deep eutectic. Evaluating the concentration dependence of the temperature and heat of the liquidus reveals that this salt solution exists as an ionic liquid up to a concentration of about 98 mole percent water, beyond which it follows more traditional electrolyte descriptions. The principles derived from this structural and spectroscopic analysis can be applied to more generally explain the freezing point depression in diverse systems. In particular, this analysis demonstrates how the phase diagrams and liquidus heat and temperature can reveal the nature of speciation within aqueous salt solutions.}, journal={ECS Meeting Abstracts}, author={Martin, James D and Boyd, Shelby}, year={2022}, month={Oct} } @article{pillai_wilcox_hillis_losey_martin_2022, title={Understanding the Water-in-Salt to Salt-in-Water Characteristics across the Zinc Chloride : Water Phase Diagram}, volume={126}, ISSN={["1520-5207"]}, url={https://doi.org/10.1021/acs.jpcb.1c10530}, DOI={10.1021/acs.jpcb.1c10530}, abstractNote={Using a series of time- and temperature-resolved synchrotron diffraction experiments, the relationship between multiple polymorphs of ZnCl2 and its respective hydrates is established. The δ-phase is found to be the pure anhydrous phase, while the α, β, and γ phases result from partial hydration. Diffraction, gravimetric, and calorimetric measurements across the entire ZnCl2·R H2O, 0 > R > ∞ composition range using ultrapure, doubly sublimed ZnCl2 establish the ZnCl2 : H2O phase diagram. The results are consistent with the existence of crystalline hydrates at R = 1.33, 3, and 4.5 and identify a mechanistic pathway for hydration. All water is not removed from hydrated ZnCl2 until the system is heated above its melting point. While hydration/dehydration is reversible in concentrated solutions, dehydration from dilute aqueous solutions can result in loss of HCl, the source of hydroxide impurities commonly found in commercial ZnCl2 preparations. The strong interaction between ZnCl2 and water exerts a significant impact on the solvent water such that the system exhibits a deep eutectic at a composition of about R = 7 (87.5 mol %) and a eutectic temperature below -60 °C.}, number={11}, journal={JOURNAL OF PHYSICAL CHEMISTRY B}, publisher={American Chemical Society (ACS)}, author={Pillai, Shelby B. and Wilcox, Robert J. and Hillis, Berkley G. and Losey, Bradley P. and Martin, James D.}, year={2022}, month={Mar}, pages={2265–2278} } @article{martin_2021, title={Reply to “A Comparison of the Stochastic and Deterministic Approaches in a Nucleation–Growth Type Model of Nanoparticle Formation”}, volume={33}, url={https://doi.org/10.1021/acs.chemmater.1c01690}, DOI={10.1021/acs.chemmater.1c01690}, abstractNote={ADVERTISEMENT RETURN TO ISSUEPREVCommentsNEXTReply to “A Comparison of the Stochastic and Deterministic Approaches in a Nucleation–Growth Type Model of Nanoparticle Formation”James D. Martin*James D. MartinDepartment of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States*Phone: 919-515-3402. Email: [email protected]More by James D. Martinhttps://orcid.org/0000-0001-7414-2683Cite this: Chem. Mater. 2021, 33, 13, 5437–5445Publication Date (Web):June 25, 2021Publication History Received17 May 2021Published online25 June 2021Published inissue 13 July 2021https://doi.org/10.1021/acs.chemmater.1c01690Copyright © 2021 American Chemical SocietyRIGHTS & PERMISSIONSArticle Views855Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (2 MB) Get e-AlertsSUBJECTS:Crystallization,Monomers,Nanoparticles,Particle size,Nucleation Get e-Alerts}, number={13}, journal={Chemistry of Materials}, publisher={American Chemical Society (ACS)}, author={Martin, James D.}, year={2021}, month={Jul}, pages={5437–5445} } @misc{martin_2020, title={Diffuse vs. Bragg Scattering: Understanding Structure Using 3-D Pair Distribution Function Analysis}, author={Martin, James}, year={2020}, month={Jul} } @article{weng_dill_martin_whitfield_hoffmann_ye_2020, title={K-space algorithmic reconstruction (KAREN): a robust statistical methodology to separate Bragg and diffuse scattering}, volume={53}, ISSN={1600-5767}, url={http://dx.doi.org/10.1107/S1600576719017060}, DOI={10.1107/S1600576719017060}, abstractNote={Diffuse scattering occurring in the Bragg diffraction pattern of a long-range-ordered structure represents local deviation from the governing regular lattice. However, interpreting the real-space structure from the diffraction pattern presents a significant challenge because of the dramatic difference in intensity between the Bragg and diffuse components of the total scattering function. In contrast to the sharp Bragg diffraction, the diffuse signal has generally been considered to be a weak expansive or continuous background signal. Herein, using 1D and 2D models, it is demonstrated that diffuse scattering in fact consists of a complex array of high-frequency features that must not be averaged into a low-frequency background signal. To evaluate the actual diffuse scattering effectively, an algorithm has been developed that uses robust statistics and traditional signal processing techniques to identify Bragg peaks as signal outliers which can be removed from the overall scattering data and then replaced by statistically valid fill values. This method, described as a `K-space algorithmic reconstruction' (KAREN), can identify Bragg reflections independent of prior knowledge of a system's unit cell. KAREN does not alter any data other than that in the immediate vicinity of the Bragg reflections, and reconstructs the diffuse component surrounding the Bragg peaks without introducing discontinuities which induce Fourier ripples or artifacts from underfilling `punched' voids. The KAREN algorithm for reconstructing diffuse scattering provides demonstrably better resolution than can be obtained from previously described punch-and-fill methods. The superior structural resolution obtained using the KAREN method is demonstrated by evaluating the complex ordered diffuse scattering observed from the neutron diffraction of a single plastic crystal of CBr4 using pair distribution function analysis.}, number={1}, journal={Journal of Applied Crystallography}, publisher={International Union of Crystallography (IUCr)}, author={Weng, James and Dill, Eric D. and Martin, James D. and Whitfield, Ross and Hoffmann, Christina and Ye, Feng}, year={2020}, month={Feb}, pages={159–169} } @book{martin_holt_2020, title={Nutritional supplements comprising dietary metal complexes in a matrix of cellulosic materials}, author={Martin, James and Holt, J.}, year={2020}, month={May} } @article{martin_2020, title={Particle Size Is a Primary Determinant for Sigmoidal Kinetics of Nanoparticle Formation: A “Disproof” of the Finke–Watzky (F-W) Nanoparticle Nucleation and Growth Mechanism}, volume={32}, ISSN={0897-4756 1520-5002}, url={http://dx.doi.org/10.1021/acs.chemmater.9b02839}, DOI={10.1021/acs.chemmater.9b02839}, abstractNote={ADVERTISEMENT RETURN TO ISSUEPREVCommentsNEXTParticle Size Is a Primary Determinant for Sigmoidal Kinetics of Nanoparticle Formation: A “Disproof” of the Finke–Watzky (F-W) Nanoparticle Nucleation and Growth MechanismJames D. Martin*James D. MartinDepartment of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States*Email: [email protected]More by James D. Martinhttp://orcid.org/0000-0001-7414-2683Cite this: Chem. Mater. 2020, 32, 8, 3651–3656Publication Date (Web):February 27, 2020Publication History Received17 July 2019Revised13 August 2019Published online27 February 2020Published inissue 28 April 2020https://doi.org/10.1021/acs.chemmater.9b02839Copyright © 2020 American Chemical SocietyRIGHTS & PERMISSIONSArticle Views1587Altmetric-Citations10LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (818 KB) Get e-AlertsSupporting Info (2)»Supporting Information Supporting Information SUBJECTS:Kinetic parameters,Kinetic modeling,Nanoparticles,Nucleation,Materials Get e-Alerts}, number={8}, journal={Chemistry of Materials}, publisher={American Chemical Society (ACS)}, author={Martin, James D.}, year={2020}, month={Feb}, pages={3651–3656} } @article{martin_hillis_hou_2020, title={Transition Zone Theory Compared to Standard Models: Reexamining the Theory of Crystal Growth from Melts}, volume={124}, ISSN={1932-7447 1932-7455}, url={http://dx.doi.org/10.1021/acs.jpcc.0c03003}, DOI={10.1021/acs.jpcc.0c03003}, abstractNote={Ideas proposed at the beginning of the 20th century to describe the temperature dependence of crystal growth rates have become accepted as the “standard model.” Specifically, it was proposed that r...}, number={34}, journal={The Journal of Physical Chemistry C}, publisher={American Chemical Society (ACS)}, author={Martin, James D. and Hillis, Berkley G. and Hou, Feier}, year={2020}, month={Jun}, pages={18724–18740} } @inproceedings{martin_2019, title={3-D pair distribution function analysis to resolve real structures}, author={Martin, James}, year={2019}, month={Jun} } @article{hou_martin_2019, title={Isotope Effects Reveal the Template Influence on the Crystal Growth of a Metal–Halide Network}, volume={123}, ISSN={1932-7447 1932-7455}, url={http://dx.doi.org/10.1021/acs.jpcc.9b01334}, DOI={10.1021/acs.jpcc.9b01334}, abstractNote={Crystallization requires the organization of matter into structures with long-range translational order. However, because crystal growth exhibits non-Arrhenius kinetics, it is not possible to apply classical transition state theory to decipher mechanistic details of the crystallization process. With our recently discovered transition zone theory of crystallization, for the first time, it is possible to extract enthalpic and entropic activation parameters for crystal growth from which chemically/physically meaningful mechanistic information is obtained. Here, we measured the respective temperature-dependent crystal growth rates for d0, d1, d9, and d10 isotopomers of the halozeotype CZX-1 to explore how the templating cation impacts the rate of crystal growth. The isotopic dependence of the Kauzmann temperature, TK, and the enthalpic and entropic activation parameters reveal that the mechanism of crystal growth is controlled by both inertial (mass) effects of the template and hydrogen bonding between the te...}, number={12}, journal={The Journal of Physical Chemistry C}, publisher={American Chemical Society (ACS)}, author={Hou, Feier and Martin, James D.}, year={2019}, month={Feb}, pages={7475–7485} } @misc{martin_2019, title={Separating Diffuse from Bragg Scattering: Introducing the K-space Algorithmic REconstructioN (KAREN), First integrated workshop on neutron diffuse scattering from single crystals}, author={Martin, James}, year={2019}, month={Jun} } @inproceedings{martin_2019, title={Understanding Cooperativity in Condensed Phase Reactions: Application of Kauzmann’s configurational entropy and Adam and Gibbs’ cooperativity to crystal growth}, author={Martin, James}, year={2019}, month={Jun} } @article{martin_nock_2018, title={A Nonlinear, “Sticky” Web of Study for Chemistry: A Graphical Curricular Tool for Teaching and Learning Chemistry Built upon the Interconnection of Core Chemical Principles}, volume={95}, ISSN={0021-9584 1938-1328}, url={http://dx.doi.org/10.1021/acs.jchemed.7b00878}, DOI={10.1021/acs.jchemed.7b00878}, abstractNote={The National Research Council’s Framework for K–12 Science Education articulates the need to shift science curricula from being a collection of discrete facts to curricula that integrate core ideas and practices. To help teachers better integrate content and to respond to expressed frustration regarding extensive lists of standards often presented as collections of isolated topics in prescribed courses of study, we developed a web of study approach to general chemistry curricula. Instead of a traditional linear course of study for which lists of standards tend to shift teaching and learning toward coverage, the web of study approach emphasizes integration of concepts by which learners build a coherent and self-consistent body of knowledge. Using both spatial and color-coded relationships, a general chemistry course is mapped onto the triad of primary concepts, Matter–Energy–Bonding, each represented as a primary color. Subtopics, traditionally identified in bulleted lists of standards, are graphically pla...}, number={12}, journal={Journal of Chemical Education}, publisher={American Chemical Society (ACS)}, author={Martin, James D. and Nock, Katherine A.}, year={2018}, month={Oct}, pages={2134–2140} } @book{martin_weng_whitfield_hoffman_ye_2018, title={K-Space Algorithmic Reconstruction (KAREN)}, url={https://docs.mantidproject.org/nightly/algorithms/DeltaPDF3D.html}, journal={Mantid}, author={Martin, James and Weng, James and Whitfield, Ross and Hoffman, Christina and Ye, Feng}, year={2018} } @misc{martin_nock_2018, title={Teaching and Learning through Exploration and Discovery}, author={Martin, James and Nock, K. A.}, year={2018}, month={Nov} } @article{martin_hou_2018, title={Transition zone theory of the glass transition}, volume={491}, ISSN={0022-3093}, url={http://dx.doi.org/10.1016/J.JNONCRYSOL.2018.03.037}, DOI={10.1016/J.JNONCRYSOL.2018.03.037}, abstractNote={An energy-based theory of the glass transition is described and validated by evaluation of crystallization and viscosity data of sixteen diverse systems, ranging from the fragile o-terphenyl to the strong SiO2 glass formers, including glass formation in non-crystallizing polymers. Transition zone theory demonstrates an inverse temperature dependence of the entropy of activation for crystallization and viscous relaxation which results in a temperature at which their free energies of activation are equivalent. Below this temperature there is a greater probability of crystallization than of relaxation. Under such conditions, crystal-like organization can propagate only over the internal length scales for which the system has relaxed, i.e. a few nanometers. However, that structural organization makes the barrier to bulk liquid relaxation insurmountable, resulting in glass formation. The temperature of the crystallization-relaxation free energy of activation equivalence point, defines the glass transition temperature. The temperature dependent slope of the free energy of activation for relaxation at the equivalence point reflects the fragility of the system. The time-temperature dependence of viscous relaxation shifts the crystallization-relaxation free energy of activation equivalence point, consistent with the sample history dependence of Tg. Crystal-like formation over nanometer-length scales, which can still occur below Tg, is shown to account for glass aging.}, journal={Journal of Non-Crystalline Solids}, publisher={Elsevier BV}, author={Martin, James D. and Hou, Feier}, year={2018}, month={Jul}, pages={24–33} } @article{dennin_schultz_feig_finkelstein_greenhoot_hildreth_leibovich_martin_moldwin_o’dowd_et al._2017, title={Aligning Practice to Policies: Changing the Culture to Recognize and Reward Teaching at Research Universities}, volume={16}, ISSN={1931-7913}, url={http://dx.doi.org/10.1187/cbe.17-02-0032}, DOI={10.1187/cbe.17-02-0032}, abstractNote={ Recent calls for improvement in undergraduate education within STEM (science, technology, engineering, and mathematics) disciplines are hampered by the methods used to evaluate teaching effectiveness. Faculty members at research universities are commonly assessed and promoted mainly on the basis of research success. To improve the quality of undergraduate teaching across all disciplines, not only STEM fields, requires creating an environment wherein continuous improvement of teaching is valued, assessed, and rewarded at various stages of a faculty member’s career. This requires consistent application of policies that reflect well-established best practices for evaluating teaching at the department, college, and university levels. Evidence shows most teaching evaluation practices do not reflect stated policies, even when the policies specifically espouse teaching as a value. Thus, alignment of practice to policy is a major barrier to establishing a culture in which teaching is valued. Situated in the context of current national efforts to improve undergraduate STEM education, including the Association of American Universities Undergraduate STEM Education Initiative, this essay discusses four guiding principles for aligning practice with stated priorities in formal policies: 1) enhancing the role of deans and chairs; 2) effectively using the hiring process; 3) improving communication; and 4) improving the understanding of teaching as a scholarly activity. In addition, three specific examples of efforts to improve the practice of evaluating teaching are presented as examples: 1) Three Bucket Model of merit review at the University of California, Irvine; (2) Evaluation of Teaching Rubric, University of Kansas; and (3) Teaching Quality Framework, University of Colorado, Boulder. These examples provide flexible criteria to holistically evaluate and improve the quality of teaching across the diverse institutions comprising modern higher education. }, number={4}, journal={CBE—Life Sciences Education}, publisher={American Society for Cell Biology (ASCB)}, author={Dennin, Michael and Schultz, Zachary D. and Feig, Andrew and Finkelstein, Noah and Greenhoot, Andrea Follmer and Hildreth, Michael and Leibovich, Adam K. and Martin, James D. and Moldwin, Mark B. and O’Dowd, Diane K. and et al.}, editor={Reiness, C. GaryEditor}, year={2017}, month={Dec}, pages={es5} } @misc{martin_2017, title={Aqueous solutions as ionic liquids that can function as tunable solvents. GRIP-NanoMaterials for Water Treatment}, author={Martin, James}, year={2017}, month={Aug} } @article{hillis_losey_weng_ghaleb_hou_martin_2017, title={From rate measurements to mechanistic data for condensed matter reactions: a case study using the crystallization of [Zn(OH2)(6)][ZnCl4]}, volume={7}, ISSN={2073-4352}, url={http://dx.doi.org/10.3390/cryst7010011}, DOI={10.3390/cryst7010011}, abstractNote={The kinetics of crystallization of the R = 3 hydrate of zinc chloride, [Zn(OH2)6][ZnCl4], is measured by time-resolved synchrotron x-ray diffraction, time-resolved neutron diffraction, and by differential scanning calorimetry. It is shown that analysis of the rate data using the classic Kolmogorov, Johnson, Mehl, Avrami (KJMA) kinetic model affords radically different rate constants for equivalent reaction conditions. Reintroducing the amount of sample measured by each method into the kinetic model, using our recently developed modified-KJMA model (M-KJMA), it is shown that each of these diverse rate measurement techniques can give the intrinsic, material specific rate constant, the velocity of the phase boundary, vpb. These data are then compared to the velocity of the crystallization front directly measured optically. The time-resolved diffraction methods uniquely monitor the loss of the liquid reactant and formation of the crystalline product demonstrating that the crystallization of this hydrate phase proceeds through no intermediate phases. The temperature dependent vpb data are then well fit to transition zone theory to extract activation parameters. These demonstrate that the rate-limiting component to this crystallization reaction is the ordering of the waters (or protons) of hydration into restricted positions of the crystalline lattice resulting in large negative entropy of activation.}, number={1}, journal={Crystals}, publisher={MDPI AG}, author={Hillis, B. G. and Losey, B. P. and Weng, J. and Ghaleb, N. and Hou, F. and Martin, J. D.}, year={2017}, pages={11} } @article{martin_2017, title={Let science be a springboard for politics}, volume={546}, ISSN={0028-0836 1476-4687}, url={http://dx.doi.org/10.1038/546577A}, DOI={10.1038/546577A}, number={7660}, journal={Nature}, publisher={Springer Science and Business Media LLC}, author={Martin, James}, year={2017}, month={Jun}, pages={577–577} } @article{tu_rajule_liu_martin_2017, title={Nanostructure diffraction analysis of a copper/single walled carbon nanotube nanocomposite synthesized by Laser Surface Implanting}, volume={113}, ISSN={["1873-3891"]}, DOI={10.1016/j.carbon.2016.11.004}, abstractNote={A new wet process, denoted as Laser Surface Implanting (LSI), has been developed to synthesize a Copper-Single Wall Carbon NanoTube (Cu-SWCNT) metal nanocomposite by dispersing SWCNTs into molten copper, followed by rapid and non-equilibrium solidification to form the Cu-SWCNT nanocomposite such that dispersed SWCNTs could locked in positions without agglomerating into large clusters. However, the nanometer sizes of the SWCNT clusters inside this nanocomposite make it extremely difficult to obtain TEM images with discernable SWCNT clusters in the copper matrix. In this paper, TEM images and their diffraction patterns for annealed pure copper, quenched pure copper (by the same synthesis process without introducing SWCNTs), and Cu-SWCNT nanocomposite are compared. It is concluded that TEM images with discernable SWCNT clusters are rare. Therefore, diffraction patterns are better tools to identify SWCNTs within the copper matrix. The indexed diffraction patterns confirm that the copper fcc lattice is preserved. However, the Cu-SWCNT nanocomposite samples also exhibit ordered diffuse scattering, consisting of at least two polyhedra of diffuse-scattering bounded by the {110}* and {200}* family of reciprocal lattice planes, respectively. In addition several samples exhibit super-lattice Bragg diffraction indicative expanded unit cells. It thus appears that the SWCNTs are incorporated into the Cu matrix with precise arrangements commensurate with specific Cu lattice planes.}, journal={CARBON}, author={Tu, Jay F. and Rajule, Nilesh and Liu, Yi and Martin, James}, year={2017}, month={Mar}, pages={1–9} } @misc{martin_nock_2017, title={Teaching and Learning through Exploration and Discovery}, author={Martin, James and Nock, K. A.}, year={2017}, month={Oct} } @inproceedings{martin_2017, title={The Chemistry of Governing}, author={Martin, James}, year={2017}, month={Aug} } @inproceedings{martin_2017, title={Transition Zone Theory of Crystal Growth}, author={Martin, James}, year={2017}, month={Nov} } @inproceedings{transition zone theory of crystal growth for melt crystallization applied to low-dimensional, non-stoichiometric, and glass-to-crystal systems_2017, publisher={University of New England}, year={2017} } @article{sen_losey_gordon_argyropoulos_martin_2016, title={Ionic Liquid Character of Zinc Chloride Hydrates Define Solvent Characteristics that Afford the Solubility of Cellulose}, volume={120}, ISSN={1520-6106 1520-5207}, url={http://dx.doi.org/10.1021/acs.jpcb.5b11400}, DOI={10.1021/acs.jpcb.5b11400}, abstractNote={The recently described ionic liquid structure of the three equivalent hydrate of zinc chloride (ZnCl2·R H2O, R = 3, existing as [Zn(OH2)6][ZnCl4]) explains the solubility of cellulose in this medium. Only hydrate compositions in the narrow range of 3 - x < R < 3 + x with x ≈ 1 dissolve cellulose. Once dissolved, the cellulose remains in solution up to the R = 9 hydrate. Neutron diffraction and differential pair distribution function analysis of cellulose and model compound solutions (1 wt % cellulose in the R = 3 hydrate and 1 wt % ethanol in the R = 3 hydrate and the ZnCl2·3 ethanol liquid) coupled with detailed solubility measurements suggest that cellulose solubility occurs via coordination of the primary OH to the hydrated zinc cation with ring hydroxyls forming part of a second coordination shell around the cation of the ionic liquid.}, number={6}, journal={The Journal of Physical Chemistry B}, publisher={American Chemical Society (ACS)}, author={Sen, Sanghamitra and Losey, Bradley P. and Gordon, Elijah E. and Argyropoulos, Dimitris S. and Martin, James D.}, year={2016}, month={Feb}, pages={1134–1141} } @article{li_wei_li_kim_wen_duan_guo_wang_liu_yin_2016, title={Regulation in free amino acid profile and protein synthesis pathway of growing pig skeletal muscles by low-protein diets for different time periods1,2}, volume={94}, ISSN={0021-8812 1525-3163}, url={http://dx.doi.org/10.2527/jas.2016-0917}, DOI={10.2527/jas.2016-0917}, abstractNote={The objective of the study was to explore the extent to which the dietary CP level can be reduced for maintaining muscle protein deposition in growing pigs as well as the related mechanism and whether the response to dietary protein restriction is diversely modified throughout the 2 trial periods. A total of 36 pigs (9.57 ± 0.64 kg initial BW) were individually penned and fed 1 of 3 diets for 10 or 25 d. During each period, the diets contained 20, 17, and 14% CP, respectively. Both the 17% CP diet and the 14% CP diet were supplemented with Lys, Met, Thr, and Trp to provide the same total concentrations as those in the 20% CP diet. Results showed that feeding the 14% CP diet for 10 or 25 d seriously impaired ( < 0.05) growth performance of the pigs compared with those fed the 20 or 17% CP diets. Pigs fed the 20% CP diet for 25 d had a higher ( < 0.05) serum content of urea nitrogen than those fed the 17 and 14% CP diets. In addition, the free AA (FAA) profile in skeletal muscle of the pigs was evidently changed ( < 0.05) by the low-protein diets for 25 d; of note, the 14% CP diet increased ( < 0.05) the size of muscle FAA pool compared with the 20% CP diet. Meanwhile, on d 25, reducing dietary CP levels also influenced ( < 0.05) mRNA levels of specific AA transceptors expressed in skeletal muscle, especially revealing the striking differences between the 14 and 20% CP diet-fed pigs. Most importantly, we observed a globally decreased ( < 0.05) activation of the mammalian target of rapamycin complex 1 (mTORC1) pathway in skeletal muscle of pigs fed the 14% CP diet, whereas only partial inhibition was observed for those fed the 17% CP diet compared with those fed the 20% CP diet. However, feeding the low-protein diets for 10 d had minimal effects on serum parameters, muscle FAA profile, and muscle mTORC1 pathway of the pigs. Taken together, our results indicate that supplementing with limiting AA to the 14% CP diet is not highly effective for the pigs in restoring protein synthesis and muscle growth, whereas the 17% CP diet likely maintains the pigs' muscle mass, which were regulated, at least in part, by mediating AA transceptors expression, FAA profile, and activation of the mTORC1 pathway.}, number={12}, journal={Journal of Animal Science}, publisher={Oxford University Press (OUP)}, author={Li, Y. H. and Wei, H. K. and Li, F. N. and Kim, S. W. and Wen, C. Y. and Duan, Y. H. and Guo, Q. P. and Wang, W. L. and Liu, H. N. and Yin, Y. L.}, year={2016}, month={Dec}, pages={5192–5205} } @article{wilcox_folmer_kennemur_martin_2016, title={Synthesis of luminescent nitroxobenzene oligomers by aluminum chloride catalyzed dehydration of nitrobenzene}, volume={103}, ISSN={0277-5387}, url={http://dx.doi.org/10.1016/j.poly.2015.07.077}, DOI={10.1016/j.poly.2015.07.077}, abstractNote={Under solvothermal reaction conditions, nitrobenzene is heated in the presence of aluminum chloride to yield a luminescent and paramagnetic low molecular weight polymeric material along with AlCl3·(H2O)6. MALDI mass spectral analysis demonstrates that the repeat unit consists of the biphenyl moiety (ONC6H3–ONC6H4). Four distinct fractions are isolated based on differential solubility characteristics. The primary differentiating features of these fractions appear to be their considerably different conjugation and branching characteristics. A radical mechanism, consistent with the formation of Wheland intermediates is proposed to account for the observed mass spec, IR, UV–Vis, EPR and size exclusion chromatographic data. Luminescence spectroscopy data is also provided demonstrating the white light emission exhibited by these polymers.}, number={Part A}, journal={Polyhedron}, publisher={Elsevier BV}, author={Wilcox, Robert J. and Folmer, Jacob C.W. and Kennemur, Justin G. and Martin, James D.}, year={2016}, month={Jan}, pages={35–43} } @article{wilcox_losey_folmer_martin_zeller_sommer_2015, title={Crystalline and Liquid Structure of Zinc Chloride Trihydrate: A Unique Ionic Liquid}, volume={54}, ISSN={0020-1669 1520-510X}, url={http://dx.doi.org/10.1021/ic5024532}, DOI={10.1021/ic5024532}, abstractNote={The water/ZnCl(2) phase diagram in the vicinity of the 75 mol % water composition is reported, demonstrating the existence of a congruently melting phase. Single crystals of this 3-equiv hydrate were grown, and the crystal structure of [Zn(OH(2))(6)][ZnCl(4)] was determined. Synchrotron X-ray and neutron diffraction and IR and Raman spectroscopy along with reverse Monte Carlo modeling demonstrate that a CsCl-type packing of the molecular ions persists into the liquid state. Consistent with the crystalline and liquid structural data, IR spectroscopy demonstrates that the O-H bonds of coordinated water do not exhibit strong intermolecular hydrogen ion bonding but are significantly weakened because of the water's coordination to Lewis acidic zinc ions. The O-H bond weakening makes this system a very strong hydrogen-bond donor, whereas the ionic packing along with the nonpolar geometry of the molecular ions makes this system a novel nonpolar, hydrogen-bonding, ionic liquid solvent.}, number={3}, journal={Inorganic Chemistry}, publisher={American Chemical Society (ACS)}, author={Wilcox, Robert J. and Losey, Bradley P. and Folmer, Jacob C. W. and Martin, James D. and Zeller, Matthias and Sommer, Roger}, year={2015}, month={Jan}, pages={1109–1119} } @article{bradforth_miller_dichtel_leibovich_feig_martin_bjorkman_schultz_smith_2015, title={Improve undergraduate science education}, volume={523}, number={7560}, journal={Nature}, author={Bradforth, S. E. and Miller, E. R. and Dichtel, W. R. and Leibovich, A. K. and Feig, A. L. and Martin, J. D. and Bjorkman, K. S. and Schultz, Z. D. and Smith, T. L.}, year={2015}, pages={282–284} } @book{bradforth_dichtel_leibovich_feig_martin_bjorkman_shultz_smith_miller_2015, place={Tuson, AZ}, title={Searching for Better Approaches: Effective Evaluation of Teaching and Learning in STEM}, institution={Research Corporation for Science Advancement}, author={Bradforth, S.E. and Dichtel, W.R. and Leibovich, A.K. and Feig, A.L. and Martin, J.D. and Bjorkman, K.S. and Shultz, Z.D. and Smith, T.L. and Miller, E.R.}, year={2015} } @article{hou_martin_dill_folmer_josey_2015, title={Transition Zone Theory of Crystal Growth and Viscosity}, volume={27}, ISSN={0897-4756 1520-5002}, url={http://dx.doi.org/10.1021/acs.chemmater.5b00956}, DOI={10.1021/acs.chemmater.5b00956}, abstractNote={Crystal growth and viscous relaxation are known to be activated processes, albeit inadequately described by transition state theories. By considering a transition zone and accounting for the Kauzmann-type temperature dependence of configurational entropy we here develop transition zone theory (TZT). Entropic and enthalpic activation probabilities scale with the cooperativity of the reactant, and the attempt frequency prefactor (kBT/h) is scaled by a characteristic phonon wavelength equal to twice the lattice constant for crystal growth, and the speed of sound squared for viscous relaxation. TZT accurately describes the temperature-dependent crystal growth rates and viscosity of diverse materials over the entire temperature ranges Tg to Tm and Tg to Tc, respectively, and affords a detailed mechanistic understanding of condensed matter reactions similar to that afforded to molecular chemistry by the Eyring equation.}, number={9}, journal={Chemistry of Materials}, publisher={American Chemical Society (ACS)}, author={Hou, Feier and Martin, James D. and Dill, Eric D. and Folmer, Jacob C. W. and Josey, Amanda A.}, year={2015}, month={Apr}, pages={3526–3532} } @inproceedings{martin_2015, title={Understanding the mechanism of crystallization, viscous relaxation and the glass transition}, author={Martin, James}, year={2015} } @article{bradforth_miller_dichtel_leibovich_feig_martin_bjorkman_schultz_smith_2015, title={University learning: Improve undergraduate science education}, volume={523}, ISSN={0028-0836 1476-4687}, url={http://dx.doi.org/10.1038/523282A}, DOI={10.1038/523282A}, abstractNote={It is time to use evidence-based teaching practices at all levels by providing incentives and effective evaluations, urge Stephen E. Bradforth, Emily R. Miller and colleagues.}, number={7560}, journal={Nature}, publisher={Springer Science and Business Media LLC}, author={Bradforth, Stephen E. and Miller, Emily R. and Dichtel, William R. and Leibovich, Adam K. and Feig, Andrew L. and Martin, James D. and Bjorkman, Karen S. and Schultz, Zachary D. and Smith, Tobin L.}, year={2015}, month={Jul}, pages={282–284} } @article{dill_martin_2014, title={Crystalsim: Gui For Geometrical Simulations Of Crystal Growth}, volume={10}, url={https://zenodo.org/record/12265}, DOI={10.5281/zenodo.12265}, publisher={Zenodo}, author={Dill, Eric and Martin, James D.}, year={2014}, month={Oct} } @book{dill_folmer_martin_2014, title={PlasticSim: Simulator For The Plastic Phase Of Carbon Tetrabromide And Calculator For 2-D Reciprocal Space Slices}, url={https://zenodo.org/record/12270}, DOI={10.5281/zenodo.12270}, institution={Zenodo}, author={Dill, Eric and Folmer, Jacob C. W. and Martin, James D.}, year={2014}, month={Oct} } @book{dill_folmer_martin_2014, title={Ramdog: A Graphical User Interface Program To Interactively Analyze 2D Diffraction Images}, url={https://zenodo.org/record/12268}, DOI={10.5281/zenodo.12268}, institution={Zenodo}, author={Dill, Eric and Folmer, Jacob C. W. and Martin, James D.}, year={2014}, month={Oct} } @article{dill_folmer_martin_2013, title={Crystal Growth Simulations To Establish Physically Relevant Kinetic Parameters from the Empirical Kolmogorov–Johnson–Mehl–Avrami Model}, volume={25}, ISSN={0897-4756 1520-5002}, url={http://dx.doi.org/10.1021/cm402751x}, DOI={10.1021/cm402751x}, abstractNote={A series of simulations was performed to enable interpretation of the material and physical significance of the parameters defined in the Kolmogorov, Johnson and Mehl, and Avrami (KJMA) rate expression commonly used to describe phase boundary controlled reactions of condensed matter. The parameters k, n, and t0 are shown to be highly correlated, which if unaccounted for seriously challenge mechanistic interpretation. It is demonstrated that rate measurements exhibit an intrinsic uncertainty without precise knowledge of the location and orientation of nucleation with respect to the free volume into which it grows. More significantly, it is demonstrated that the KJMA rate constant k is highly dependent on sample size. However, under the simulated conditions of slow nucleation relative to crystal growth, sample volume and sample anisotropy correction affords a means to eliminate the experimental condition dependence of the KJMA rate constant, k, producing the material-specific parameter, the velocity of the ...}, number={20}, journal={Chemistry of Materials}, publisher={American Chemical Society (ACS)}, author={Dill, Eric D. and Folmer, Jacob C. W. and Martin, James D.}, year={2013}, month={Oct}, pages={3941–3951} } @article{dill_josey_folmer_hou_martin_2013, title={Experimental Determination of the Crystallization Phase-Boundary Velocity in the Halozeotype CZX-1}, volume={25}, ISSN={0897-4756 1520-5002}, url={http://dx.doi.org/10.1021/cm402745e}, DOI={10.1021/cm402745e}, abstractNote={Isothermal crystallization experiments were performed on the halozeotype CZX-1 with 2D temperature- and time-resolved synchrotron X-ray diffraction (TtXRD) and differential scanning calorimetry (DSC). These crystallization experiments demonstrate that the fundamental materials property, the velocity of the phase boundary of the crystallization front, vpb, can be recovered from the Kolmogorov Johnson and Mehl and Avrami (KJMA) model of phase-boundary controlled reactions by introducing the sample volume into the KJMA rate expression. An additional corrective term is required if the sample volume of the crystallization measurement is anisotropic. The concurrent disappearance of the melt and appearance of the crystalline phase demonstrate that no intermediates exist in the crystallization pathway. The velocity of the phase boundary approaches 0 as the glass transition (Tg ≈ 30 °C) is approached and at about 10° below melting point (Tm = 173 °C). The velocity of the phase boundary reaches a maximum of 30 μm s...}, number={20}, journal={Chemistry of Materials}, publisher={American Chemical Society (ACS)}, author={Dill, Eric D. and Josey, Amanda A. and Folmer, Jacob C.W. and Hou, Feier and Martin, James D.}, year={2013}, month={Oct}, pages={3932–3940} } @article{sen_martin_argyropoulos_2013, title={Review of Cellulose Non-Derivatizing Solvent Interactions with Emphasis on Activity in Inorganic Molten Salt Hydrates}, volume={1}, ISSN={2168-0485 2168-0485}, url={http://dx.doi.org/10.1021/sc400085a}, DOI={10.1021/sc400085a}, abstractNote={During cellulose dissolution in non-derivatizing solvents, the inter- and intramolecular hydrogen bonds of the polymer are deconstructed. This occurs either by hydrogen bond formation between one or more components of the solvent systems and the hydroxyl groups of the cellulose or by coordination bond formation between the metal ion present in the medium and the hydroxyl group of cellulose molecules. None of the polymer molecules are actually chemically modified during dissolution. In the first part of this review, we examine the literature pertaining to the different interaction mechanisms between cellulose and non-derivatizing solvent systems with emphasis on the inorganic molten salt hydrates. In the second part of this effort, we further review inorganic molten salt hydrates from the point of view of the changes they impart to the physical properties of the cellulose and the various chemical reactions that can be performed in it.}, number={8}, journal={ACS Sustainable Chemistry & Engineering}, publisher={American Chemical Society (ACS)}, author={Sen, Sanghamitra and Martin, James D. and Argyropoulos, Dimitris S.}, year={2013}, month={Jun}, pages={858–870} } @article{allenbaugh_schauer_josey_martin_anokhin_ivanov_2012, title={Effect of Axial Interactions on the Formation of Mesophases: Comparison of the Phase Behavior of Dialkyl 2,2 '-bipyridyl-4,4 '-dicarboxylate Complexes of Pt(II), Pt(IV), and Pt(II)/Pt(IV) Molecular Alloys}, volume={24}, ISSN={["1520-5002"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84870921929&partnerID=MN8TOARS}, DOI={10.1021/cm3018105}, abstractNote={Crystal engineering through the use of metal-based interactions is relatively common, but this approach has not been widely used to develop highly ordered liquid-crystalline (LC) phases. Herein is presented a Pt(II)/Pt(IV) system with a highly ordered LC phase engineered to form through metal-based MX chain interactions of the type Pt(II)···Cl-Pt(IV). This LC material constitutes a molecular alloy in which a single mesophase is formed from two components, and is the first alloy to include a Pt(IV) component. The molecular alloy was characterized via differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and variable-temperature X-ray diffraction (VT XRD). The alloy properties are contrasted with complimentary analyses of the individual components. The newly synthesized tetrachloro(dialkyl 4,4′-dicarboxylate-2,2′-bipyridyl)platinum(IV) complexes (PtLnCl4, n is the number of carbons in the alkyl chain) are themselves liquid crystalline. Structural and thermal properties of the Pt(II) ...}, number={23}, journal={CHEMISTRY OF MATERIALS}, author={Allenbaugh, Rachel J. and Schauer, Cynthia K. and Josey, Amanda and Martin, James D. and Anokhin, Denis V. and Ivanov, Dimitri A.}, year={2012}, month={Dec}, pages={4517–4530} } @inproceedings{martin_2012, place={Blacksburg, VA}, title={Hydrated Zinc Chloride, a Potential Solvent for Cellulose}, author={Martin, James}, year={2012}, month={Jun} } @inproceedings{martin_ross_hildreth_columbus_hayden_kosowsky_2012, title={Undergraduate Science Education: Sustaining Reform Begins with Faculty}, author={Martin, James D. and Ross, Jennifer and Hildreth, Michael and Columbus, Linda and Hayden, Michael and Kosowsky, Arthur}, year={2012} } @article{kennemur_desousa_martin_novak_2011, title={Reassessing the Regioregularity of N-(1-Naphthyl)-N '-(n-octadecyl)polycarbodiimide Using Solution Infrared Spectroscopy}, volume={44}, ISSN={["0024-9297"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-79959426990&partnerID=MN8TOARS}, DOI={10.1021/ma2005052}, abstractNote={ADVERTISEMENT RETURN TO ISSUEPREVNoteReassessing the Regioregularity of N-(1-Naphthyl)-N′-(n-octadecyl)polycarbodiimide Using Solution Infrared SpectroscopyJustin G. Kennemur, Joseph D. DeSousa, James D. Martin, and Bruce M. Novak*View Author Information Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United StatesE-mail: [email protected]Cite this: Macromolecules 2011, 44, 12, 5064–5067Publication Date (Web):May 25, 2011Publication History Received7 March 2011Revised11 May 2011Published online25 May 2011Published inissue 28 June 2011https://doi.org/10.1021/ma2005052Copyright © 2011 American Chemical SocietyRIGHTS & PERMISSIONSArticle Views819Altmetric-Citations5LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit Read OnlinePDF (2 MB) Get e-AlertsSupporting Info (1)»Supporting Information Supporting Information SUBJECTS:Absorption,Monomers,Polymer solutions,Polymers,Thin films Get e-Alerts}, number={12}, journal={MACROMOLECULES}, author={Kennemur, Justin G. and DeSousa, Joseph D. and Martin, James D. and Novak, Bruce M.}, year={2011}, month={Jun}, pages={5064–5067} } @inproceedings{martin_2010, title={A Mechanistic Study of Melting and Crystallization: phase transitions, nucleation and growth}, author={Martin, James}, year={2010}, month={Aug} } @inproceedings{martin_2010, place={PacifiChem, Hawaii}, title={Aqueous Solutions of Zinc Chloride are Tunable Ionic Liquids}, author={Martin, James}, year={2010}, month={Dec} } @article{schmidt_shultz_martin_boyle_2010, title={Goldilocks Effect in Magnetic Bistability: Remote Substituent Modulation and Lattice Control of Photoinduced Valence Tautomerism and Light-Induced Thermal Hysteresis}, volume={132}, ISSN={0002-7863 1520-5126}, url={http://dx.doi.org/10.1021/ja101957c}, DOI={10.1021/ja101957c}, abstractNote={The thermal-induced and photoinduced valence tautomerism of a series of Co(dioxolene)(2)(4-X-py)(2) complexes (dioxolene = 3,5-di-tert-butylcatecholate or 3,5-di-tert-butylsemiquinonate; 4-X-py = 4-(X)pyridine, X = H (1), OMe (2), Me (3), CN (4), Br (5), NO(2) (6)) is described. The thermal valence tautomerism (ls-Co(III)(SQ)(Cat)(4-X-py)(2) <--> hs-Co(II)(SQ)(SQ)(4-X-py)(2)) is only observed for complexes 4, 5, and 6 where each is accompanied by a hysteresis loop of ca. 5 K. When a crystalline sample of 4-6 is held at 10 K in a SQUID magnetometer and irradiated with white light (lambda = 400-850 nm), the hs-Co(II) tautomer is formed. When the light source is removed, and the sample is slowly heated, the hs-Co(II) tautomer persists until ca. 90 K, approximately 40 K higher than the thermal stability of previously reported complexes. Heating and cooling the sample while maintaining irradiation results in the appearance of a new light-induced thermal hysteresis loop below 90 K (DeltaT = ca. 25 K). Below 50 K, the hs-Co(II) tautomer displays temperature-independent relaxation to the ls-Co(III) form, and above 50 K, the relaxation is thermally activated with an activation energy E(a) > ca. 1500 cm(-1). The coordination geometry (trans-pyridines), pyridine substitution, and crystal packing forces conspire to create the comparatively thermally stable photogenerated hs-Co(II) tautomer, thus providing an excellent handle for molecular and crystal engineering studies.}, number={17}, journal={Journal of the American Chemical Society}, publisher={American Chemical Society (ACS)}, author={Schmidt, R. D. and Shultz, D. A. and Martin, J. D. and Boyle, P. D.}, year={2010}, month={May}, pages={6261–6273} } @article{schmidt_shultz_martin_2010, title={Magnetic Bistability in a Cobalt Bis(dioxolene) Complex: Long-Lived Photoinduced Valence Tautomerism}, volume={49}, ISSN={["1520-510X"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-77950273381&partnerID=MN8TOARS}, DOI={10.1021/ic901998p}, abstractNote={The thermal- and photoinduced valence tautomerism of a cobalt bis(dioxolene) complex is described. The thermal conversion is precipitous, complete within 10 K, and is accompanied by a 5 K hysteresis loop (107 K < T(1/2) < 112 K). Rapid thermal quenching (300 K --> 10 K in ca. 5 s) and photoinduced valence tautomerism result in trapping of the metastable Co(II)-state at low temperatures through intermolecular hydrogen bonding. This lattice stabilization results in unmatched kinetic and thermal stability for a valence tautomer from 10-50 K, with residual hs-Co(II) persisting until about 90 K.}, number={7}, journal={INORGANIC CHEMISTRY}, author={Schmidt, Robert D. and Shultz, David A. and Martin, James D.}, year={2010}, month={Apr}, pages={3162–3168} } @article{kizewski_boyle_hesterberg_martin_2010, title={Mixed Anion (Phosphate/Oxalate) Bonding to Iron(III) Materials}, volume={132}, ISSN={["1520-5126"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-77749237327&partnerID=MN8TOARS}, DOI={10.1021/ja908807b}, abstractNote={A novel phosphate/oxalate inorganic-organic hybrid material has been prepared to elucidate synthesis and bonding characteristics of iron(III) with both phosphate and organic matter (OM). Such mixed anion bonding of inorganic oxyanions and OM to iron(III) and aluminum(III) in environmental systems has been proposed but not proven, mainly because of the complexity of natural geochemical matrices. The compound reported here with the molecular formula of [C(3)H(12)N(2)](2)[Fe(5)(C(2)O(4))(2)(H(x)PO(4))(8)] (I) was hydrothermally synthesized and characterized by single crystal X-ray diffraction and X-ray absorption spectroscopy (XAS). In this new structure, Fe-O octahedra and P-O tetrahedra are connected by corner-sharing to form a 2-D network in the a-b plane. Oxalate anions cross-link these Fe-P layers constructing a 3-D anionic framework. A diprotonated structure-directing template, DAP (1,3-diaminopropane), resides in the oxalate layer of the structure and offsets the negative charge of the anionic framework. Iron K-edge XANES spectra confirmed that the iron in I is Fe(III). The crystal structure of I is used to successfully fit its Fe K-edge EXAFS spectrum, which exhibits spectral signatures that unambiguously identify iron-phosphate and iron-OM bonding. Such molecular spectroscopic features will be invaluable for the evaluation of complex environmental systems. Furthermore, syntheses demonstrated the critical role of the templating amine to mediate whether or not the iron(III) is reduced by the organic acid.}, number={7}, journal={JOURNAL OF THE AMERICAN CHEMICAL SOCIETY}, author={Kizewski, Fiona R. and Boyle, Paul and Hesterberg, Dean and Martin, James D.}, year={2010}, month={Feb}, pages={2301–2308} } @book{martin_2010, place={Chapel Hill, North Carolina}, title={Protecting the Academic Core}, institution={The University of North Carolina System}, author={Martin, J.D.}, year={2010} } @article{martin_2010, place={Raleigh, NC}, title={School board policy and practice}, journal={News and Observer}, publisher={News and Observer Publishing Company}, author={Martin, James}, year={2010}, month={Mar} } @article{martin_2009, place={Raleigh, NC}, title={Budgeting Past, Present and Future}, url={https://d.lib.ncsu.edu/collections/catalog/technician-2009-01-27}, journal={Technician}, publisher={North Carolina State University}, author={Martin, James}, year={2009}, month={Jan}, pages={3} } @inproceedings{martin_2009, title={Evolution of Structure in Condensed Matter: CrystalsPlastic Crystals Liquid Crystals Liquids}, author={Martin, James}, year={2009}, month={Jul} } @inproceedings{martin_2009, title={Faculty Governance: Rediscovering the Collegiate Business Model for Higher Education}, author={Martin, James}, year={2009}, month={Jun} } @misc{martin_2008, place={Tucson, AZ}, title={A Chemist Becomes Chair of the Faculty: Using Science Demos as Object Lessons for Good University Policy}, author={Martin, James}, year={2008}, month={Jul} } @article{folmer_withers_welberry_martin_2008, title={Coupled orientational and displacive degrees of freedom in the high-temperature plastic phase of the carbon tetrabromide alpha-CBr(4)}, volume={77}, ISSN={["1098-0121"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-42049094259&partnerID=MN8TOARS}, DOI={10.1103/physrevb.77.144205}, abstractNote={Two-dimensional single-crystal synchrotron x-ray diffraction of the high-temperature plastic phase of CBr4 reveals relatively sharp G{+-}1/2 {l_brace}110{r_brace}* sheets of diffuse intensity (where G represents the set of average structure Fm-3m allowed Bragg reflections). This intense and highly structured diffuse scattering arises from the large amplitude excitation of transverse polarized displacive modes of distortion and shows that a set of six possible orientations of the individual CBr4 molecules in the plastic phase are strongly coupled with displacive relaxational degrees of freedom. Using Monte Carlo simulations to model the diffuse intensity, the displacive relaxations are shown to be along the molecular nearest-neighbor 1/2{l_angle}110{r_angle} real space directions associated with the relative orientations of individual and nearest-neighbor CBr4 tetrahedra.}, number={14}, journal={PHYSICAL REVIEW B}, author={Folmer, Jacob C. W. and Withers, Ray L. and Welberry, T. R. and Martin, James D.}, year={2008}, month={Apr} } @inproceedings{martin_2008, title={Relaxation and structural assembly control the mechanism of crystal growth in condensed matter}, author={Martin, James}, year={2008}, month={Apr} } @article{kanatzidis_poeppelmeier_bobev_guloy_hwu_lachgar_latturner_raymond_schaak_seo_et al._2008, title={Report from the third workshop on future directions of solid-state chemistry: The status of solid-state chemistry and its impact in the physical sciences}, volume={36}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-36148951787&partnerID=MN8TOARS}, DOI={10.1016/j.progsolidstchem.2007.02.002}, abstractNote={Public awareness of solid-state chemistry, or more broadly solid-state science and technology rapidly grew along with the transistor revolution and the development of the integrated circuit. We are now at the half-way point in the solid state century [Scientific American The Solid-State Century 1997;8(1) [special issue]], a period of the last 50 years when the term “solid state electronics” was in general vernacular and “solid state” was prominently stamped on consumer electronics appliances, almost as a synonym for “advanced” or “modern.” Clearly without the Bell Labs discovery of the first transistor, which boosted an electrical signal a 100-fold, our personal computers would not be possible, and the information age it spawned would never have happened. It is clear with hindsight that those individuals, companies, regions and nations that have embraced the new information technology have flourished. At the present time the solid-state age does not show any sign of stopping. In this the second half of the century, we have chips with 10 million transistors, solar photovoltaics and all—solid-state lighting, cell phones, displays, data storage, the insulated gate bipolar transistor (IGBT) revolutionizing power electronics, and enthusiasm is high for quantum-optical devices which may begin to dominate new technology. The goal of the Solid State Chemistry Workshop was to assess the current state of solid-state chemistry and explore its impact on allied disciplines as well as industry. In this report we articulate the solid-state chemistry community's sense of the future opportunities and directions and make several recommendations. The findings of this workshop could act as a vehicle for informing the solid-state chemistry community of programs and opportunities for support at NSF and elsewhere. This report aims to identify research directions in solid-state chemistry closely aligned with emerging or potential technologies, as well as areas of original research that could lead to new advances in materials science, solid-state physics and the solid-state sciences in general. Of course, judgment must be exercised to distinguish which of such efforts have true fundamental value, and sufficient patience must be accorded for fundamental research to ultimately bring about new technologies. A major societal impact of the solid state and materials chemistry community is the education of students who are able to excel in multidisciplinary areas crucial to the competitiveness of American industry. Solid state and materials chemistry by its nature, with its interdisciplinary history, has the ability to prepare and educate its graduates to excel in a wide variety of industries including the fields of energy, pharmaceuticals, optical materials and all manner of electronic devices, and nano and biotechnology. Since by their nature emerging technologies depend on the discovery of new materials and their properties, individuals with training in solid-state chemistry are key members of research teams and companies developing these technologies. Which scientific disciplines are affected most by what goes on in solid-state chemistry? The focus of the proposed workshop was two-fold, we sought a close look at the discipline of solid-state chemistry in the beginning of the third millennium and explored its continued impact and relationship with allied disciplines in the physical sciences and also industry. This report highlights a number of accomplishments, emerging research directions and areas requiring increased effort but is not meant to be all inclusive and it is certain that we have left out a number of important aspects. An assessment of how solid-state chemistry is impacting the physical sciences, through continuing advances and the many ways of interacting across disciplinary boundaries, could help the National Science Foundation and the scientific community better appreciate its value and contributions in the greater scientific and societal context. The report also includes discussions of existing and new modes for educating students, and the development and use of national facilities for performing state-of-the-art research in our field. A critical enabler of this societal benefit has been funding from the NSF and other agencies in this area, in particular our nation's premier national user facilities. 1. There is great interest in developing methodologies for synthesis of materials with intended functionalities. To continue the pace of progress solid-state chemistry has enjoyed in the past we recommend sustained support for exploratory synthesis and directed synthesis aimed at new materials' discoveries and the development of methodological and design principles. Syntheses assisted by theory and modeling are only still emerging and should be encouraged. 2. Structure–property relationships are the fundamental underpinning of solid-state sciences. Be they experimental or theoretical, efforts and ideas that will make advances in this area should be supported with sustained funding from the Foundation. 3. The Foundation should encourage and support outreach ideas aimed at explaining, promoting and projecting the place and significance of solid-state chemistry to society. This could be done under the umbrella of Centers or smaller special projects. 4. Fundamental research and materials discovery emanating from NSF and other agency support of solid-state chemistry in academia ultimately affects the strength of industry and therefore the economy. Where appropriate, the NSF should seek the advice of industrial experts in solid-state chemistry as a development tool in formulating potential research directions. In addition existing programs aimed at supporting academic–industry collaborations leveraging industry resources and providing graduate students with goal-driven perspectives are viewed favorably. 5. Solid state and materials chemistry research will extract maximum benefit from NSF funding of personnel and support activities in national facilities. These often unique facilities enable the solution of important problems in solid-state chemistry. Greater utilization of these facilities is limited by lack of expertise on the use of these techniques amongst solid-state chemists and limited user support from the facilities. The NSF has an important role to play as an advocate for the needs of solid-state chemistry to the facilities. 6. The NSF should consider and implement mechanisms for supporting collaborative research between the solid-state sciences and investigators in far-ranging fields, which may require creative funding mechanisms involving other agencies. 7. Programs within NSF that foster collaborative research with international PIs, groups or Institutes such as the Materials World Network should be supported. Also recommended is funding for short term overseas career development ‘sabbaticals’ for faculty and increases in the number of US postdoctoral fellowships for positions abroad with a well-defined NSF affiliation.}, number={1-2}, journal={Progress in Solid State Chemistry}, author={Kanatzidis, M.G. and Poeppelmeier, K.R. and Bobev, S. and Guloy, A.M. and Hwu, S.-J. and Lachgar, A. and Latturner, S.E. and Raymond and Schaak, E. and Seo, D.-K. and et al.}, year={2008}, pages={1–133} } @article{williams_saggese_wilcox_martin_muddiman_2007, title={Effect of matrix crystal structure on ion abundance of carbohydrates by matrix-assisted laser desorption/ionization Fourier transform ion cyclotron resonance mass spectrometry}, volume={21}, ISSN={["0951-4198"]}, url={http://europepmc.org/abstract/med/17279479}, DOI={10.1002/rcm.2904}, abstractNote={Abstract}, number={5}, journal={RAPID COMMUNICATIONS IN MASS SPECTROMETRY}, author={Williams, Taufika Islam and Saggese, Diana A. and Wilcox, Robert J. and Martin, James D. and Muddiman, David C.}, year={2007}, pages={807–811} } @inproceedings{martin_2007, title={From order to disorder and back: melting and recrystallization of metal-halide networks}, author={Martin, James}, year={2007} } @inproceedings{martin_2007, title={Independent Measurement of Nucleation and Crystal Growth in Condensed Matter: a new look at classic nucleation theory}, author={Martin, James}, year={2007} } @article{khare_martin_hesterberg_2007, title={Phosphate bonding configuration on ferrihydrite based on molecular orbital calculations and XANES fingerprinting}, volume={71}, ISSN={["0016-7037"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-34548540954&partnerID=MN8TOARS}, DOI={10.1016/j.gca.2007.07.008}, abstractNote={Sorption of phosphate by Fe(III)- and Al(III)-(hydr)oxide minerals regulates the mobility of this potential water pollutant in the environment. The objective of this research was to determine the molecular configuration of phosphate bound on ferrihydrite at pH 6 by interpreting P K-edge XANES spectra in terms of bonding mode. XANES and UV–visible absorption spectra for aqueous Fe(III)–PO4 solutions (Fe/P molar ratio = 0–2.0) provided experimental trends for energies of P(3p)–O(2p) and Fe(3d)–O(2p) antibonding molecular orbitals. Molecular orbitals for Fe(III)–PO4 or Al(III)–PO4 complexes in idealized monodentate or bidentate bonding mode were generated by conceptual bonding arguments, and Extended-Hückel molecular orbital computations were used to understand and assign XANES spectral features to bound electronic states. The strong white line at the absorption edge in P K-edge XANES spectra for Fe–PO4 or Al–PO4 systems is attributable to an electronic transition from a P 1s atomic orbital into P(3p)–O(2p) or P(3p)–O(2p)–Al(3p) antibonding molecular orbitals, respectively. For Fe–PO4 systems, a XANES peak at 2–5 eV below the edge was assigned to a P 1s electron transition into Fe(4p)–O(2p) antibonding molecular orbitals. Similarly, a shoulder on the low-energy side of the white line for variscite corresponds to a transition into Al(3p)–O(2p) orbitals. In monodentate-bonded phosphate, Fe–O bonding is optimized and P–O bonding is weakened, and the converse is true of bidentate-bonded phosphate. These differences explained an inverse correlation between energies of P(3p)–O(2p) and Fe(3d)–O(2p) antibonding molecular orbitals consistent with a monodentate-to-bidentate transition in aqueous Fe(III)–PO4 solutions. The intensity of the XANES pre-edge feature in Fe(III)-bonded systems increased with increasing number of Fe(III)–O–P bonds. Based on the similarity of intensity and splitting of the pre-edge feature for phosphate sorbed on ferrihydrite at 750 mmol/kg at pH 6 and aqueous Fe–PO4 solutions containing predominantly bidentate complexes, XANES results indicated that phosphate adsorbed on ferrihydrite was predominantly a bidentate–binuclear surface complex.}, number={18}, journal={GEOCHIMICA ET COSMOCHIMICA ACTA}, author={Khare, Nidhi and Martin, James D. and Hesterberg, Dean}, year={2007}, month={Sep}, pages={4405–4415} } @article{frankowski_capracotta_martin_khan_spontak_2007, title={Stability of organically modified montmorillonites and their polystyrene nanocomposites after prolonged thermal treatment}, volume={19}, ISSN={["0897-4756"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-34250177310&partnerID=MN8TOARS}, DOI={10.1021/cm061953k}, abstractNote={Melt intercalation of montmorillonite (MMT) into polymeric matrices to improve the mechanical properties of polymers has evolved into a subject of tremendous fundamental and technological interest....}, number={11}, journal={CHEMISTRY OF MATERIALS}, author={Frankowski, David J. and Capracotta, Michael D. and Martin, James D. and Khan, Saad A. and Spontak, Richard J.}, year={2007}, month={May}, pages={2757–2767} } @inproceedings{martin_reis_2007, title={Time Resolved X-ray and Neutron Scattering: Probing Chemical Transformations and Structural Dynamics}, author={Martin, James D. and Reis, David}, year={2007} } @article{ting_liu_withers_norén_james_gerald_2006, title={A structure and phase analysis investigation of the "1:1" ordered A2InNbO6 perovskites (A=Ca2+, Sr2+, Ba2+)}, volume={179}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-31044436522&partnerID=MN8TOARS}, DOI={10.1016/j.jssc.2005.11.012}, abstractNote={The structures of the Ba2InNbO6, Sr2InNbO6 and Ca2InNbO6 “1:1” complex perovskites have been refined from neutron powder diffraction data. Both the A=Ca and Sr compounds occur at room temperature in P121/n1 (a=ap+bp, b=–ap+bp, c=2cp) perovskite-related superstructures while the A=Ba compound occurs in the Fm3¯m, a=2ap, elpasolite structure type. In the case of the A=Ca compound, an extensive Ca2[(Ca2x/3In1−xNbx/3)Nb]O6 ‘solid solution’ field spanning compositions between Ca4Nb2O9 and Ca2InNbO6 in the CaO–InO3/2–NbO5/2 ternary phase diagram is shown to exist. Under the conditions of synthesis used, the ‘solid solution’ field stops just short of the ideal 1:1 Ca2InNbO6 composition.}, number={2}, journal={Journal of Solid State Chemistry}, author={Ting, V. and Liu, Y. and Withers, R.L. and Norén, L. and James, M. and Gerald, J.D.F.}, year={2006}, pages={551–562} } @inproceedings{martin_2006, title={Amorphous Materials Engineering: Designing Structure in Metal Halide Liquids and Glasses}, author={Martin, James}, year={2006} } @article{dattelbaum_martin_2006, title={Benzene and ethylene binding to copper(I)-ziconium(IV) chloride materials: The crystal structure and solid-state reactivity of ((bz)(2)Cu)(2)Zr2Cl10 center dot bz}, volume={25}, ISSN={["0277-5387"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-30344466371&partnerID=MN8TOARS}, DOI={10.1016/j.poly.2005.08.011}, abstractNote={The solvothermal reaction of Cu 2 ZrCl 6 and ZrCl 4 in benzene is shown to yield the molecular species ((bz) 2 Cu) 2 Zr 2 Cl 10  · bz ( 1 ), which is characterized by single crystal X-ray diffraction. The structure consists of edge-shared dimers of zirconium chloride octahedra whose axial chlorides are bridged by bis-benzene chlorocuprate fragments. The Cu 2 Zr 2 tetramers are linked in the crystal lattice by edge-to-face π-stacking of the coordinated and lattice benzene molecules, as well as benzene-to-chloride hydrogen bonding. Benzene is lost from this material in a stepwise fashion resulting in what are described to be chain, ((bz)Cu) 2 Zr 2 Cl 10 ( 2 ) and layered clay-type materials, Cu 2 Zr 2 Cl 10 ( 3 ). The desolvated materials, 2 and 3 , reversibly sorb ethylene, as characterized by sorption isotherms, in situ pressure-resolved synchrotron X-ray diffraction and UV/Vis diffuse reflectance spectroscopy.}, number={2}, journal={POLYHEDRON}, author={Dattelbaum, AM and Martin, JD}, year={2006}, month={Jan}, pages={349–359} } @book{martin_2006, title={Hydrogen Bonding in Metal Halides: Lattice Effects and Electronic Distortions}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84890738497&partnerID=MN8TOARS}, DOI={10.1002/9783527609932.ch18}, abstractNote={This chapter contains sections titled: Introduction A Hierarchy of Structure-directing Forces Hydrogen Bond Influence on Melts and Crystallization Electronic Implications of Hydrogen Bonding Conclusions Acknowledgments References}, journal={Inorganic Chemistry in Focus III}, author={Martin, J.D.}, year={2006}, pages={267–277} } @book{martin_keary_thornton_novotnak_knutson_folmer_2006, place={Springfield, VA}, title={Metallotropic Liquid Crystals: Surfactant Induced Order in Molten Metal Halides}, volume={BNL-7745-2006}, number={2006}, journal={National Synchrotron Light Source Activity Report}, institution={National Technical Information Service, U.S. Department of Commerce}, author={Martin, James D. and Keary, Cristin L. and Thornton, Todd A. and Novotnak, Mark P. and Knutson, Jeremey W. and Folmer, Jacob C.W.}, year={2006}, pages={2–96-2–97} } @article{martin_keary_thornton_novotnak_knutson_folmer_2006, title={Metallotropic liquid crystals formed by surfactant templating of molten metal halides}, volume={5}, ISSN={["1476-1122"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-33645640615&partnerID=MN8TOARS}, DOI={10.1038/nmat1610}, abstractNote={Liquid crystals consist of anisotropic molecular units, and most are organic molecules. Materials incorporating metals into anisotropic molecules, described as metallomesogens, have been prepared. Anisotropic structures such as one-dimensional chains and two-dimensional layers are frequently observed in solid-state inorganic materials, however, little is understood about structural organization in melts of such materials. Achieving liquid-crystalline behaviour in inorganic fluids should be possible if the anisotropic structure can be retained or designed into the molten phase. We demonstrated the ability to engineer zeolite-type structures into metal halide glasses and liquids. In this work we have engineered lamellar, cubic and hexagonal liquid-crystalline structure in metal-halide melts by controlling the volume fraction and nature of the inorganic block (up to 80 mol%) with respect to alkylammonium surfactants. The high metal content of these liquid-crystalline systems significantly advances the field of metallomesogens, which seeks to combine magnetic, electronic, optical, redox and catalytic properties common to inorganic materials with the fluid properties of liquid crystals.}, number={4}, journal={NATURE MATERIALS}, author={Martin, JD and Keary, CL and Thornton, TA and Novotnak, MP and Knutson, JW and Folmer, JCW}, year={2006}, month={Apr}, pages={271–275} } @inproceedings{martin_2006, title={On the Fate of Crystalline Network Structures Upon Melting}, author={Martin, James}, year={2006} } @article{capracotta_sullivan_martin_2006, title={Sorptive reconstruction of CuMCl4 (M = Al and Ga) upon small-molecule binding and the competitive binding of CO and ethylene}, volume={128}, ISSN={["1520-5126"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-33750078396&partnerID=MN8TOARS}, DOI={10.1021/ja063172q}, abstractNote={Carbonyl adducts to CuMCl(4) (M = Al and Ga) have been characterized by single-crystal and/or powder X-ray diffraction, IR and diffuse reflectance UV/vis spectroscopy. Up to two equivalents of carbon monoxide ( approximately 200 cm(3)/g relative to stp) are sorbed at room temperature, with equilibrium binding pressures of below 0.5 atm of CO. The carbonyl bonding is shown to be nonclassical, implicating the dominance of sigma-bonding and absence of pi-back-bonding. Analysis of the crystalline structures of the parent and adduct phases provides an atomistic picture of the sorptive reconstruction reaction. Comparison of the reactivity of CO and ethylene with these CuMCl(4) materials, as well as other copper(I) halide compounds that exhibit classical and nonclassical modes of bonding, demonstrates the ability to tune the reactivity of the crystalline frameworks with selectivity for carbon monoxide or olefins, respectively.}, number={41}, journal={JOURNAL OF THE AMERICAN CHEMICAL SOCIETY}, author={Capracotta, Michael D. and Sullivan, Roger M. and Martin, James D.}, year={2006}, month={Oct}, pages={13463–13473} } @misc{martin_2005, title={Advice for the Chemistry of Life}, author={Martin, James}, year={2005}, month={May} } @book{martin_2005, title={Amorphous materials engineering: Designing structure in liquid and glassy metal-halide networks}, volume={170}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-23744502926&partnerID=MN8TOARS}, journal={Ceramic Transactions}, author={Martin, J.D.}, year={2005}, pages={57–67} } @article{seto_sall_martin_novak_2005, title={Know what's in your bottle: The ring opening metathesis polymerization in aqueous medium by simple ruthenium complex}, volume={46}, number={2}, journal={Polymer Preprints}, author={Seto, Keitaro and Sall, Leslie and Martin, James D. and Novak, Bruce M.}, year={2005}, pages={931–932} } @book{wilcox_martin_folmer_2005, place={Raleigh, NC}, title={Lewis acid catalyzed polymerization of nitro compounds}, institution={North Carolina State University}, author={Wilcox, R.J. and Martin, J.D. and Folmer, J.C.W.}, year={2005} } @inproceedings{martin_2005, title={Probing the Mechanism of Small Molecule Sorption into Metal-Halide Crystalline Networks}, author={Martin, James}, year={2005}, month={Dec} } @article{van maanen_seeley_capracotta_white_bukovnik_hartmann_martin_spontak_2005, title={Property and Morphology Development in Nanocomposite Thermoplastic Elastomer Gels}, volume={21}, ISSN={0743-7463 1520-5827}, url={http://dx.doi.org/10.1021/la047837i}, DOI={10.1021/la047837i}, abstractNote={Thermoplastic elastomer gels (TPEGs), molecular networks composed of a microphase-separated multiblock copolymer swollen to a large extent by a low-volatility midblock-selective solvent, are ubiquitous in a wide range of contemporary technologies, including home and office products, athletic equipment, and telecommunications devices. In this work, we investigate the effect of several network-forming nanoscale modifiers-two different silica nanoparticles, three different nanoclays, and a multiwalled carbon nanotube-on the property and morphology development of a TPEG prepared from a microphase-ordered poly(styrene-b-(ethylene-co-butylene)-b-styrene) (SEBS) triblock copolymer imbibed with an EB-compatible aliphatic mineral oil. Dynamic rheological measurements of the resultant nanocomposite TPEGs confirm that addition of these modifiers affects the linear viscoelastic threshold and increases, to different extents, the dynamic elastic modulus, the dynamic yield stress, and the maximum operating temperature of the parent TPEG. X-ray diffraction analysis reveals that the nanoclays used to generate three series of modified TPEGs are generally swollen with copolymer and/or solvent.}, number={7}, journal={Langmuir}, publisher={American Chemical Society (ACS)}, author={van Maanen, Guillermo J. and Seeley, Sabrina L. and Capracotta, Michael D. and White, Scott A. and Bukovnik, Rudolf R. and Hartmann, Jürgen and Martin, James D. and Spontak, Richard J.}, year={2005}, month={Mar}, pages={3106–3115} } @misc{martin_2005, title={Structure in Metal-Halide Melts: from Angstrom to Nanometer Scales}, author={Martin, James}, year={2005}, month={May} } @article{knutson_martin_mitzi_2005, title={Tuning the band gap in hybrid tin iodide perovskite semiconductors using structural templating}, volume={44}, ISSN={["1520-510X"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-22544465836&partnerID=MN8TOARS}, DOI={10.1021/ic050244q}, abstractNote={Structural distortions within the extensive family of organic/inorganic hybrid tin iodide perovskite semiconductors are correlated with their experimental exciton energies and calculated band gaps. The extent of the in- and out-of-plane angular distortion of the SnI4(2-) perovskite sheets is largely determined by the relative charge density and steric requirements of the organic cations. Variation of the in-plane Sn-I-Sn bond angle was demonstrated to have the greatest impact on the tuning of the band gap, and the equatorial Sn-I bond distances have a significant secondary influence. Extended Hückel tight-binding band calculations are employed to decipher the crystal orbital origins of the structural effects that fine-tune the band structure. The calculations suggest that it may be possible to tune the band gap by as much as 1 eV using the templating influence of the organic cation.}, number={13}, journal={INORGANIC CHEMISTRY}, author={Knutson, JL and Martin, JD and Mitzi, DB}, year={2005}, month={Jun}, pages={4699–4705} } @article{khare_hesterberg_martin_2005, title={XANES investigation of phosphate sorption in single and binary systems of iron and aluminum oxide minerals}, volume={39}, ISSN={["1520-5851"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-16844386656&partnerID=MN8TOARS}, DOI={10.1021/es049237b}, abstractNote={Phosphate sorption on Fe- and Al-oxide minerals helps regulate the solubility and mobility of P in the environment. The objective of this study was to characterize phosphate adsorption and precipitation in single and binary systems of Fe- and Al-oxide minerals. Varying concentrations of phosphate were reacted for 42 h in aqueous suspensions containing goethite, ferrihydrite, boehmite, or noncrystalline (non-xl) Al-hydroxide, and in 1:1 (by mass) mixed-mineral suspensions of goethite/boehmite and ferrihydrite/ non-xl Al-hydroxide at pH 6 and 22 degrees C. X-ray absorption near edge structure (XANES) spectroscopy was used to detect precipitated phosphate and distinguish PO4 associated with Fe(III) versus Al(III) in mixed-mineral systems. Changes in the full width at half-maximum height (fwhm) in the white-line peak in P K-XANES spectra provided evidence for precipitation in Al-oxide single-mineral systems, but not in goethite or ferrihydrite systems. Similarly, adsorption isotherms and XANES data showed evidence for precipitation in goethite/boehmite mixtures, suggesting that mineral interactive effects on PO4 sorption were minimal. However, sorption in ferrihydrite/non-xl Al-hydroxide systems and a lack of XANES evidence for precipitation indicated that mineral interactions inhibited precipitation in these binary mixtures.}, number={7}, journal={ENVIRONMENTAL SCIENCE & TECHNOLOGY}, author={Khare, N and Hesterberg, D and Martin, JD}, year={2005}, month={Apr}, pages={2152–2160} } @inproceedings{martin_2004, title={Amorphous Materials Engineering in Metal-Halide Networks}, publisher={American Ceramic Society}, author={Martin, James}, year={2004} } @misc{martin_2004, title={Flexible Crystals and Structured Amorphous Materials}, author={Martin, James}, year={2004} } @article{patel_aberg_sanchez_capracotta_martin_spontak_2004, title={Morphological, mechanical and gas-transport characteristics of crosslinked poly(propylene glycol): homopolymers, nanocomposites and blends}, volume={45}, ISSN={["1873-2291"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-3342879397&partnerID=MN8TOARS}, DOI={10.1016/j.polymer.2004.06.024}, abstractNote={Linear polyethers possess unusually high CO2 solubility and, hence, selectivity due to the presence of accessible ether linkages that can interact with the quadrupolar moment of CO2 molecules. In this work, membranes derived from crosslinked poly(propylene glycol) diacrylate (PPGda) oligomers differing in molecular weight (M), as well as PPGda nanocomposites containing either an organically-modified montmorillonite clay or a methacrylate-terminated fumed silica are investigated and compared with highly CO2-selective poly(ethylene glycol) diacrylate (PEGda) homopolymer and nanocomposite membranes previously reported. The rheological and permeation properties of PPGda depend sensitively on M, with the elastic modulus decreasing, but CO2 permeability and CO2/H2 selectivity increasing, with increasing M. Incorporation of either nanofiller into PPGda enhances the elastic modulus and reduces the gas permeability in the resultant nanocomposites without strongly affecting CO2/H2 selectivity. Blending PPGda and PEGda prior to chemical crosslinking yields binary membranes that exhibit intermediate gas-transport properties accurately described by a linear rule of mixtures.}, number={17}, journal={POLYMER}, author={Patel, NP and Aberg, CM and Sanchez, AM and Capracotta, MD and Martin, JD and Spontak, RJ}, year={2004}, month={Aug}, pages={5941–5950} } @inproceedings{martin_capracotta_2004, title={Olefin vs. Carbonyl Reactivity with Copper(I)/Lewis Acid Frameworks}, author={Martin, James and Capracotta, Michael D.}, year={2004}, month={Jul} } @inproceedings{martin_2004, title={On the Mechanism of Metal-Halide Network Formation and Crystal Growth}, author={Martin, James}, year={2004}, month={Jun} } @inbook{martin_2004, place={New York}, title={Solid State Devices}, volume={4}, booktitle={Chemistry: foundations and applications}, publisher={Macmillan}, author={Martin, James}, editor={Lagowski, J.J. and Banks, A.J. and Holme, T. and Silber, H.Editors}, year={2004}, pages={142–148} } @article{martin_hess_boyle_2004, title={Synthesis of [NH4]MnCl2(OAc) and [NH4](2)MnCl4(H2O)(2) by solvothermal dehydration and structure/property correlations in a one-dimensional antiferromagnet}, volume={43}, ISSN={["0020-1669"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-2442565694&partnerID=MN8TOARS}, DOI={10.1021/ic049881r}, abstractNote={The utility of the solvothermal dehydration strategy whereby superheated acetonitrile reacts with water of hydration to form ammonium acetate is demonstrated in the synthesis of [NH(4)]MnCl(2)(OAc), I, and [NH(4)](2)MnCl(4)(H(2)O)(2), II, from MnCl(2).4H(2)O. The structure of I is shown to crystallize in the monoclinic space group C2/c (No. 15) with a = 15.191(6) A, b = 7.044(2) A, c = 13.603(6) A, beta = 107.31 degrees, V = 1389.7(9) cm(-)(1), and Z = 8. The structure of II crystallizes in the space group I4/mmm (No. 139) with a = 7.5250(5) A, b = 8.276(2) A, V = 468.6(1) cm(-)(1), and Z = 2. Both structures exhibit extensive hydrogen bonding that controls both local Mn-Cl bonding and the interchain organization. I is shown to be a one-dimensional Heisenberg antiferromagnet with an intrachain exchange constant J/k = -2.39 K. This structure exhibits exchange coupling intermediate between the well-studied triply and doubly chloride-bridged one-dimensional manganese Heisenberg antiferromagnets. The structure/property correlation demonstrates a linear dependence of the exchange constant on the Mn-Cl-Mn bond angle, alpha, for alpha < 94 degrees.}, number={10}, journal={INORGANIC CHEMISTRY}, author={Martin, JD and Hess, RF and Boyle, PD}, year={2004}, month={May}, pages={3242–3247} } @book{martin_2004, title={Templated Compositions of Inorganic Liquids and Glasses}, number={6,790,382}, author={Martin, James}, year={2004}, month={Sep} } @misc{martin_thornton_2004, title={Templated compositions of inorganic liquids and glasses}, volume={6,790,382}, number={2004 Sept. 14}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Martin, J. D. and Thornton, T. A.}, year={2004} } @article{singhal_capracotta_martin_khan_fedkiw_2004, title={Transport properties of hectorite based nanocomposite single ion conductors}, volume={128}, ISSN={["0378-7753"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-1542333424&partnerID=MN8TOARS}, DOI={10.1016/j.jpowsour.2003.09.064}, abstractNote={The ionic conductivity and rheological properties of clay filled nanocomposite electrolytes are reported. These electrolytes, which have potential use in lithium-ion batteries, consist of lithium-exchanged hectorite, a 2:1 layered smectite clay, dispersed in ethylene carbonate (EC) or a mixture of EC+polyethylene glycol di-methyl ether (PEG-dm, 250 MW). All samples exhibit elastic, gel-like characteristics and room temperature conductivities of order 0.1 mS/cm. A maximum in conductivity is observed at about 25 wt.% clay concentration. A maximum in hectorite basal layer spacing is also observed in the same concentration range, suggesting a direct correlation between conductivity and layer spacing. The elastic modulus and yield stress increase by two orders of magnitude and the conductivity increases by one order of magnitude with increase in hectorite concentration from 5 to 25%, which indicates the significant influence of hectorite content in determining the characteristics of these single-ion conductors. The solvent composition plays a secondary role in this regard, with addition of PEG-dm to the base EC+hectorite electrolyte producing moderate improvement in conductivity. Similarly, the addition of PEG-dm to EC+hectorite affects an increase by only a factor of three in the elastic modulus and yield stress of the electrolyte.}, number={2}, journal={JOURNAL OF POWER SOURCES}, author={Singhal, RG and Capracotta, MD and Martin, JD and Khan, SA and Fedkiw, PS}, year={2004}, month={Apr}, pages={247–255} } @article{martin_2003, title={Chemically tuning between ferromagnetism and antiferromagnetism by combining theory and synthesis in iron/manganese rhodium borides}, volume={16}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0041322713&partnerID=MN8TOARS}, number={8}, journal={Chemtracts}, author={Martin, J.D.}, year={2003}, pages={496–504} } @article{wolak_knutson_martin_boyle_sargent_white_2003, title={Dynamic disorder and conformer exchange in the crystalline monomer of polycarbonate}, volume={107}, ISSN={["1520-5207"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0346317176&partnerID=MN8TOARS}, DOI={10.1021/jp036527q}, abstractNote={Direct measurement of chemical exchange events in the crystalline polycarbonate monomer 4,4‘- isopropylidenediphenol (bisphenol A, BPA) via 2D 13C solid-state NMR reveals slow, large-amplitude aromatic ring reorientations. X-ray diffraction, however, indicates a static crystalline structure. Experiments with multiple exchange times show that ring flips occur in all of the three unique conformers found in the crystalline unit cell of this compound, but in specific cases, two of the three unique molecules actually switch conformations. Kinetic analysis of the exchange data indicates that the average rate constant kex = 0.01 s-1 for ring flips and conformer interchange at room temperature. Differential scanning calorimetry and variable-temperature powder diffraction studies indicate a systematic volume expansion that accompanies this motion but no first-order phase transition. All room-temperature exchange events may be quenched at 213 K, at least on the time scale (up to several seconds) probed in this work...}, number={48}, journal={JOURNAL OF PHYSICAL CHEMISTRY B}, author={Wolak, JE and Knutson, J and Martin, JD and Boyle, P and Sargent, AL and White, JL}, year={2003}, month={Dec}, pages={13293–13299} } @inproceedings{martin_2003, title={Educational Requirements/Opportunities at Neutron User Facilities}, author={Martin, James}, year={2003} } @inproceedings{martin_2003, title={Sorptive Reconstruction of a Metal-Halide Lattice on Small Molecule Sorption}, author={Martin, James}, year={2003}, month={Nov} } @article{sullivan_liu_smith_hanson_osterhout_ciraolo_grey_martin_2003, title={Sorptive reconstruction of the CuAlCl4 framework upon reversible ethylene binding}, volume={125}, ISSN={["0002-7863"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0042233756&partnerID=MN8TOARS}, DOI={10.1021/ja036172o}, abstractNote={Three ethylene adducts to CuAlCl(4) have been characterized by single crystal and/or powder X-ray diffraction, (13)C, (27)Al and (63)Cu MAS NMR and diffuse reflectance UV-vis spectroscopy. (C(2)H(4))(2)CuAlCl(4), a = 7.1274(5) b = 12.509(1) c = 11.997(3) beta = 91.19 degrees, Pc, Z = 4; alpha-(C(2)H(4))CuAlCl(4), a =7.041(3) b = 10.754(8) c =11.742(9) beta = 102.48(6), P2(1), Z = 4 and beta-(C(2)H(4))CuAlCl(4), a = 7.306(2), b = 16.133(3), c = 7.094(1), Pna2(1), Z = 4. Up to 2 equiv of ethylene ( approximately 200 cm(3)/g relative to stp) are sorbed at room temperatures and pressures as low as 300 Torr. The ethylene ligands are bound to copper (I) primarily through a sigma-interaction, because the AlCl(4)(-) groups also bound to copper prevent any significant pi-back-bonding. The olefin binding is reversible and has been characterized by gravimetric and volumetric adsorption analysis and by time and pressure resolved synchrotron powder X-ray diffraction. Comparison of the parent crystal structure to those of the adduct phases provide an atomistic picture of the sorptive reconstruction reactions. These are proposed to proceed by a classic substitution mechanism that is directed by the van der Waals channels of the parent crystalline lattice.}, number={36}, journal={JOURNAL OF THE AMERICAN CHEMICAL SOCIETY}, author={Sullivan, RM and Liu, HM and Smith, DS and Hanson, JC and Osterhout, D and Ciraolo, M and Grey, CP and Martin, JD}, year={2003}, month={Sep}, pages={11065–11079} } @book{martin_2003, title={Templated Compositions of Inorganic Liquids and Glasses}, number={6,540,939}, author={Martin, James}, year={2003}, month={Apr} } @misc{martin_thornton_2003, title={Templated compositions of inorganic liquids and glasses}, volume={6,540,939}, number={2003 Apr. 1}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Martin, J. D. and Thornton, T. A.}, year={2003} } @inproceedings{martin_2003, title={Understanding the Mechanism of Metal-Halide Network Formation and Crystal Growth}, author={Martin, James}, year={2003} } @article{martin_sullivan_2002, title={Composition dependence of the nucleation energy of iron antimonides from modulated elemental reactants}, volume={15}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0036198624&partnerID=MN8TOARS}, number={1}, journal={Chemtracts}, author={Martin, J.D. and Sullivan, R.M.}, year={2002}, pages={17–25} } @article{martin_goettler_fosse_iton_2002, title={Designing intermediate-range order in amorphous materials}, volume={419}, ISSN={["0028-0836"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0037179687&partnerID=MN8TOARS}, DOI={10.1038/nature01022}, abstractNote={Amorphous materials are commonly understood to consist of random organizations of molecular-type structural units. However, it has long been known that structural organizations intermediate between discrete chemical bonds and periodic crystalline lattices are present even in liquids. Numerous models--including random networks and crystalline-type structures with networks composed of clusters and voids--have been proposed to account for this intermediate-range order. Nevertheless, understanding and controlling structural features that determine intermediate-range order in amorphous materials remain fundamental, yet presently unresolved, issues. The most characteristic signature of such order is the first peak in the total structure factor, referred to as the first sharp diffraction peak or 'low Q' structure. These features correspond to large real-space distances in the materials, and understanding their origin is key to unravelling details of intermediate-range order. Here we employ principles of crystal engineering to design specific patterns of intermediate-range order within amorphous zinc-chloride networks. Using crystalline models, we demonstrate the impact of various structural features on diffraction at low values of Q. Such amorphous network engineering is anticipated to provide the structure/property relationships necessary to tailor specific optical, electronic and mechanical properties.}, number={6905}, journal={NATURE}, author={Martin, JD and Goettler, SJ and Fosse, N and Iton, L}, year={2002}, month={Sep}, pages={381–384} } @article{gautier_andersen_gougeon_halet_canadell_martin_2002, title={Electronic structure, electrical and magnetic properties of RMo8O14 compounds (R = La, Ce, Pr, Nd, Sm) containing bicapped Mo-8 clusters}, volume={41}, ISSN={["1520-510X"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0037047921&partnerID=MN8TOARS}, DOI={10.1021/ic020194e}, abstractNote={Magnetic and electrical resistivity properties of RMo(8)O(14) (R = La, Ce, Pr, Nd, Sm) compounds containing different bicapped-octahedral Mo(8) clusters are discussed. Extended Hückel (EH) molecular calculations were carried out in order to study the influence of the position of metal capping atoms on the electronic structure of different Mo(8) isomers. Different optimal metal electron counts are possible for these clusters. Periodic density functional calculations confirm the molecular character of these compounds and allow the understanding of their semiconducting and magnetic properties.}, number={18}, journal={INORGANIC CHEMISTRY}, author={Gautier, R and Andersen, OK and Gougeon, P and Halet, JF and Canadell, E and Martin, JD}, year={2002}, month={Sep}, pages={4689–4699} } @inproceedings{martin_2002, title={Evaluating and Refining Curricula}, author={Martin, James}, year={2002} } @book{hanson_martin_goettler_2002, place={Upton, New York}, title={Kinetics and Mechanism of Network Formation in a Sodalite-type Halozeotype}, journal={BNL National Synchrotron Light Source Activity Report}, institution={Brookhaven National Laboratory}, author={Hanson, J. and Martin, J.D. and Goettler, S.J.}, year={2002}, month={May} } @inproceedings{martin_2002, title={Morphing the Amorphous: Designing Structure in Amorphous Materials}, author={Martin, James}, year={2002}, month={Jun} } @book{martin_2002, title={Structure-Property Relationships in Ionic Liquids}, volume={818}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0345754739&partnerID=MN8TOARS}, journal={ACS Symposium Series}, author={Martin, J.D.}, year={2002}, pages={413–427} } @article{martin_2002, title={Structure-property relationships in ionic liquids}, volume={818}, journal={Ionic liquids: Industrial applications for green chemistry}, publisher={Washington, D.C.: American Chemical Society}, author={Martin, J. D.}, editor={R. D Rogers and Seddon, K. R.Editors}, year={2002}, pages={413–427} } @article{dattelbaum_he_tsui_martin_2002, title={Synthesis and characterization of CU2ZrCl6: a thermochromic, van Vleck paramagnet}, volume={338}, ISSN={["1873-4669"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0037118150&partnerID=MN8TOARS}, DOI={10.1016/S0925-8388(02)00230-X}, abstractNote={The solid state reaction of CuCl and ZrCl4 yields the pale yellow crystalline solid of composition Cu2ZrCl6. This material crystallizes in the trigonal space group P3̄m1 (#164) at room temperature with lattice constants a=10.9092(4) and c=6.1517, Z=3. The structure is shown to be related to ZrCl3, where every other Zr site has been replaced with Cu atoms that partially occupy the six tetrahedral interstices surrounding the now vacant octahedral interstice. At room temperature, two copper atoms are disordered about three crystallographically distinct sites. Two thermochromic transitions are observed for this material at 120 and 673 K, which appear to be related to the movement of copper from the center of a tetrahedral interstice to a trigonal planar face. A second-order Jahn–Teller distortion accounts for this structural variation. This along with the insertion of the empty Zr-4d orbitals into the already small copper (I) based HOMO–LUMO gap afford significant mixing between ground and excited states resulting in notable van Vleck paramagnetism.}, number={1-2}, journal={JOURNAL OF ALLOYS AND COMPOUNDS}, author={Dattelbaum, AM and He, L and Tsui, F and Martin, JD}, year={2002}, month={May}, pages={173–184} } @inproceedings{keary_martin_2002, title={The Salt-like Structure of Molten Salts}, author={Keary, Cristin L. and Martin, James D.}, year={2002}, month={Jul} } @article{martin_2002, title={Toward separation and purification of olefins using dithiolene complexes: An electrochemical approach}, volume={15}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0036198527&partnerID=MN8TOARS}, number={1}, journal={Chemtracts}, author={Martin, J.D.}, year={2002}, pages={26–31} } @inproceedings{martin_2001, title={Designing Structure in Ionic Liquids: A Consideration of Shape, Charge Density and Composition}, author={Martin, James}, year={2001}, month={May} } @article{kockerling_martin_2001, title={Electronic fine tuning of the structures of reduced rare-earth metal halides}, volume={40}, ISSN={["0020-1669"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0035862622&partnerID=MN8TOARS}, DOI={10.1021/ic000986d}, abstractNote={Electronic band-structure calculations on Pr3I3Ru and Y3I3Ru have been performed in order to analyze the large structural differences found in these isoelectronic compounds. These constitute two structural extremes within the family of monoclinic Re3I3Ru phases (RE = rare-earth metal) that exhibit distortions ranging from one-dimensional double chains of trans-edge-sharing octahedra (bioctahedral chains, BOH) to one-dimensional chains of trans-edge-sharing square pyramidal units bonded base to base (bisquare pyramidal chains, BSP). The structure of La3I3Ru was established by single-crystal X-ray diffraction (monoclinic, P2(1)/m, Z = 4, a = 9.343(1) A, b = 4.3469(8) A, c = 12.496(3) A, beta = 93.42(2) degrees) and found to be isomorphous with the BOH Pr3I3Ru. It is determined that the structural variation in this RE3I3Z family of materials depends largely on the differences in orbital energies between the corresponding rare-earth metal and the interstitial. These bonding considerations can be generalized to account for structural variations in a variety of other rare-earth halides as well as several group 4 or 5 reduced metal halide cluster phases.}, number={2}, journal={INORGANIC CHEMISTRY}, author={Kockerling, M and Martin, JD}, year={2001}, month={Jan}, pages={389–395} } @inproceedings{martin_2001, title={From the Wood-Shop to Crystal Engineering}, author={Martin, James}, year={2001}, month={May} } @article{martin_2001, title={From the wood-shop to crystal engineering: Teaching three-dimensional chemistry}, volume={78}, ISSN={["0021-9584"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0039436363&partnerID=MN8TOARS}, DOI={10.1021/ed078p1195}, abstractNote={Understanding structure and bonding in chemistry requires an ability to visualize in three dimensions. Proper 3-D perspective provides important insight into chemical structure and reactivity, necessary for the design of advanced materials. Working from a textbook or computer screen, however, requires that we translate 2-D images into 3-D perception. Skills traditionally taught in industrial arts for 3-D visualization from 2-D images, and the 2-D description of 3-D objects, can be readily adapted to enhance student mastery of 3-D chemistry. By teaching students to draw a series of geometric blocks, analogous to those utilized in a wood-shop class, skills are gained that significantly augment a computer-based drawing assignment used to understand complex molecular structures required for crystal engineering. Developing skills in drawing and understanding the blueprints of chemical structure prepares students to be chemical architects.}, number={9}, journal={JOURNAL OF CHEMICAL EDUCATION}, author={Martin, JD}, year={2001}, month={Sep}, pages={1195–1197} } @article{liu_sullivan_hanson_grey_martin_2001, title={Kinetics and mechanism of the beta- to alpha-CuAlCl4 phase transition: A time-resolved Cu-63 MAS NMR and powder X-ray diffraction study}, volume={123}, ISSN={["0002-7863"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0034802305&partnerID=MN8TOARS}, DOI={10.1021/ja010688v}, abstractNote={The beta and alpha phases of CuAlCl(4) have been characterized by solid-state (27)Al and (63)Cu magic angle spinning nuclear magnetic resonance. The very short spin--lattice relaxation times of the copper spins, and the sensitivity of the I = 3/2 (63)Cu nucleus to the small differences in the local structure of Cu in the two phases, allowed (63)Cu spectra to be acquired in very short time periods (1 min), in which the beta and alpha phases were clearly resolved. This time resolution was exploited to follow the phase transition from the pseudohexagonal close-packed beta-CuAlCl(4) into the pseudocubic close-packed alpha-CuAlCl(4), which occurs above 100 degrees C. In situ time-resolved (63)Cu MAS NMR and synchrotron X-ray diffraction experiments were used to measure the kinetics of this phase transition as a function of temperature. The transformation was shown to be a first-order phase transition involving no intermediate phases with an activation energy of 138 kJ/mol. The kinetic data obey a first-order Avrami--Erofe'ev rate law. A one-dimensional growth mechanism is proposed that involves a combination of Cu(+) ion self-diffusion and a translational reorganization of the close-packed anion layers imposed by the periodic rotations of [AlCl(4)](-) tetrahedra. This beta to alpha phase transformation can be induced at ambient temperatures by low partial pressures of ethylene.}, number={31}, journal={JOURNAL OF THE AMERICAN CHEMICAL SOCIETY}, author={Liu, HM and Sullivan, RM and Hanson, JC and Grey, CP and Martin, JD}, year={2001}, month={Aug}, pages={7564–7573} } @inproceedings{martin_2001, title={Mechanism of the Solid-State Phase Transition and Small Molecule Sorption into CuAlCl4}, author={Martin, James}, year={2001} } @article{alcacio_hesterberg_chou_martin_beauchemin_sayers_2001, title={Molecular scale characteristics of Cu(II) bonding in goethite-humate complexes}, volume={65}, ISSN={["1872-9533"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0035010875&partnerID=MN8TOARS}, DOI={10.1016/S0016-7037(01)00546-4}, abstractNote={—Interactions between oxide minerals and natural organic matter affect metal adsorption properties of mineral surfaces, but the mechanisms of metal bonding are not well understood. Extended X-ray absorption fine structure (EXAFS) spectroscopy analyses were performed on aqueous pastes containing Cu(II) and goethite (α-FeOOH) with humic acid adsorbed at 0, 14, 28, 57, 88, 216, and 236 g kg−1 goethite, and with aqueous suspensions of humic acid only. Analyses were conducted at the Cu K edge with 40 mmol Cu(II) kg−1 goethite or 2 mmol Cu(II) kg−1 suspension for the humic acid system. Samples were equilibrated at pH 5.6 in a 0.1 M NaNO3 background electrolyte. For all systems, analysis of EXAFS results suggests that Cu(II) is present in a distorted octahedral configuration containing four short equatorial (1.94–1.97 Å) and two longer axial bonds with oxygen. When the concentration of adsorbed humic acid on goethite was increased from 0 to 28 g kg−1, the axial Cu-O bond length decreased to 2.24 ± 0.03 Å, which was less than for individual humic acid (2.32 ± 0.02 Å) or goethite (2.29 ± 0.03 Å) samples. The apparent decrease in the axial Cu-O bond length was attributed to a decrease in the ligand field splitting energy. When humic acid ligands replace equatorial water molecules in the Cu(II) coordination sphere, a weaker ligand field strength occurs. For absorbed humic acid up to 88 g kg−1 goethite, second-shell iron neighbors were observed between 3.17 and 3.20 Å, suggesting that Cu(II) was bonded on average to both inorganic (goethite) and organic (humic acid) functional groups. In addition, derivative X-ray absorption near edge structure (XANES) spectra for Cu(II) on goethite–humate complexes (<88 g kg−1) were poorly fit by use of a linear combination of spectra for Cu(II) on goethite or humate alone. At humate concentrations between 216 and 236 g kg−1 goethite, second-shell iron neighbors could not be identified, and the Cu-Oaxial distance (2.32 ± 0.02 Å) and derivative XANES spectra strongly resembled that of Cu(II) adsorbed to humate only. Analysis of the XANES and EXAFS data suggested that Cu(II) was bonded on average to both inorganic and organic functional groups as a type A ternary complex at lower levels of adsorbed humate, and to organic groups as a type B complex at higher levels.}, number={9}, journal={GEOCHIMICA ET COSMOCHIMICA ACTA}, author={Alcacio, TE and Hesterberg, D and Chou, JW and Martin, JD and Beauchemin, S and Sayers, DE}, year={2001}, month={May}, pages={1355–1366} } @misc{martin_2001, place={Raleigh, NC}, title={Neutron Scattering in the Hands of a Synthetic Chemist}, author={Martin, James}, year={2001} } @inproceedings{martin_smith_dattelbaum_2001, title={Probing the Reactivity of Cu(I) in the Presence of Lewis Acids}, author={Martin, J.D. and Smith, D.Steve and Dattelbaum, A.M.}, year={2001}, month={May} } @article{baxter_caulton_chiang_chisholm_distasi_dutremez_martin_streib_2001, title={Synthesis and structural characterization of tricarbomethoxymethanate complexes of copper(II) and barium(II) and evaluation of their suitability for MOCVD applications}, volume={25}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0035089364&partnerID=MN8TOARS}, DOI={10.1039/b008147g}, abstractNote={The reaction between Cu(OCH3)2 and HL [L = −C(CO2CH3)3] in THF gives a mixture of two products, CuL(OCH3) and CuL2(THF)2. CuL(OCH3) was characterized by elemental analysis, infrared spectroscopy and thermal decomposition studies, and its insolubility in THF, at room temperature, suggests that it may be polymeric. The solid state structure of CuL2(THF)2 was established ia a single-crystal X-ray diffraction analysis. This complex has a tetragonally distorted trans-disubstituted octahedral structure with L binding like a conventional bidentate β-diketonate ligand; the central CO2CH3 group of each L is not coordinated. CuL2(THF)2 readily loses the two THF molecules bound to the Cu(II) center upon drying in a stream of dinitrogen to produce THF-free CuL2. Alternatively, THF-free CuL2 can be prepared by the reaction of CuL(OCH3) with HL in refluxing toluene. X-ray crystallography shows that CuL2 is a polymeric solid composed of a planar Cu(η2-L)2 repeat unit in which the central CO2CH3 group of each L binds weakly to the Cu(II) center of a neighboring unit along a “stepped” (displaced) stack of CuO4 units. The reaction between elemental barium and HL in THF requires activation with NH3(g). The product is a white solid of empirical formula BaL2·0.36THF. It was characterized by elemental analysis, 1H NMR, 13C{1H} NMR, and infrared spectroscopies, and thermal decomposition studies. It is insoluble in common laboratory solvents but soluble in strong Lewis bases such as pyridine, dimethylsulfoxide, and hexamethylphosphoramide (HMPA). The product resulting from the depolymerization of BaL2 ·0.36THF with HMPA was characterized ia a single-crystal X-ray diffraction analysis. It is a dimer of empirical formula Ba2L4(HMPA)4. It consists of two BaL2(HMPA)2 fragments linked together, in a centrosymmetric fashion, by two μ2,η3-[−C(CO2CH3)3] ligands; this is made possible by the utilization of the donor power of the pendant C(O)OCH3 group not used in CuL2(THF)2. The remaining two −C(CO2CH3)3 ligands are also bidentate but are non-bridging, and the four HMPA molecules are bonded through oxygen, resulting in a coordination number of seven for each barium. CuL2 is volatile and sublimes upon heating the amorphous material obtained from spontaneous desolvation of CuL2(THF)2, or polymeric CuL2, or CuL(OCH3) under high vacuum. The barium complexes are not volatile. Metallic copper is obtained upon heating the Cu(II) complexes to 1000 °C in a stream of argon, and formation of CuO results when these complexes are decomposed in the presence of oxygen. Thermal decomposition of BaL2·0.36THF and Ba2L4(HMPA)4 has been carried out under argon and O2–Ar atmospheres; residues containing varying amounts of BaO, BaO2 and BaCO3 were obtained depending on the experimental conditions.}, number={3}, journal={New Journal of Chemistry}, author={Baxter, D.V. and Caulton, K.G. and Chiang, W.-C. and Chisholm, M.H. and DiStasi, V.F. and Dutremez, S.G. and Martin, J.D. and Streib, W.E.}, year={2001}, pages={400–407} } @article{martin_yang_dattelbaum_2001, title={Templated synthesis of cuprous chloride networks: Synthesis and characterization of [Hpy]Cu3Cl6 and {[H3NMe](6)Cl}[M3NMe](2)Cu9Cl16}, volume={13}, ISSN={["1520-5002"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0035090807&partnerID=MN8TOARS}, DOI={10.1021/cm0006648}, abstractNote={Solvothermal reactions with a 1:1 ratio of cuprous chloride and alkylamonium salts as templating agents in acetonitrile or ethanol yield two new polyanionic chains. The trimeric chain [Cu3Cl6]3-, 1, templated by pyridinium cations, crystallizes in the monoclinic space group P21/m with a = 9.1274(8) A, b = 13.2831(5) A, c = 10.0923(7) A, β = 112.562(5)°, and Z = 2. [Cu9Cl16],7- 2, is templated by the complex cation {[H3NMe]6Cl}5+ and two independent [H3NMe]+ cations. The polyanionic chain of 2 is constructed from the condensation of tetrameric cuprous chloride building blocks and crystallizes in the triclinic space group P1 with a = 10.091(2) A, b = 10.173(2) A, c = 23.723(3) A, α = 80.12(1)°, β = 80.99(1)°, γ = 70.68(2)°, and Z = 2. The targeted stoichiometry of [A][CuCl2], with A = pyridinium or methylammonium as templates, results in the formation of condensed oligomeric building blocks that are analogous to those observed for a variety of open-framework group 13 chalcogenides. The relationship between...}, number={2}, journal={CHEMISTRY OF MATERIALS}, author={Martin, JD and Yang, JC and Dattelbaum, AM}, year={2001}, month={Feb}, pages={392–399} } @book{keary_martin_hanson_2001, place={Upton, New York}, title={VT-XRD Study of the Liquid Crystalline Phases of Surfactant Templated Zinc Chloride}, journal={National Synchrotron Light Source Activity Report}, institution={Brookhaven National Laboratory}, author={Keary, C.L. and Martin, J.D. and Hanson, J.C.}, year={2001} } @inproceedings{martin_2000, title={From the Wood-Shop to Crystal Engineering}, author={Martin, James}, year={2000} } @inproceedings{martin_2000, title={Templating Metal-Halide Crystals, Glasses and Liquids}, author={Martin, James}, year={2000}, month={Mar} } @inproceedings{martin_keary_goettler_fosse_2000, title={Templating the Structure of Inorganic Networks}, author={Martin, J.D. and Keary, C.L. and Goettler, S.J. and Fosse, N.}, year={2000}, month={Jul} } @book{sullivan_smith_martin_hanson_liu_grey_2000, place={Upton, New York}, title={The Effect Of Low Pressures Of Ethylene On -CuAlCl4 R}, journal={National Synchrotron Light Source Activity Report}, institution={Brookhaven National Laboratory}, author={Sullivan, M. and Smith, D.S. and Martin, J.D. and Hanson, J. and Liu, H. and Grey, C.P.}, year={2000} } @article{sullivan_martin_1999, title={An illuminating framework: Understanding the photoluminescence of alpha-CuAlCl4}, volume={121}, ISSN={["1520-5126"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0033520680&partnerID=MN8TOARS}, DOI={10.1021/ja9925204}, abstractNote={CuAlCl4 exemplifies a new class of phosphors based on metal halide analogues of aluminophosphates. The α- and β-CuAlCl4 phases show brilliant blue to blue-green luminescence. The electronic structure of the CuAlCl4 corner sharing tetrahedral frameworks has been explored by fluorimetric and diffuse reflectance measurements on the isomorphous series α-CuAlBrxCl4-x (x = 0−4). The photoluminescence is demonstrated to be a bulk property of the electronically isolated CuCl4/2 tetrahedra within the framework matrix. Remarkably, the structural framework is flexible such that at least 1 mol of small molecule gases per CuAlCl4 formula unit can be reversibly sorbed. The sorption/desorption of small molecule gases further results in the reversible quenching of the photoluminescence.}, number={43}, journal={JOURNAL OF THE AMERICAN CHEMICAL SOCIETY}, author={Sullivan, RM and Martin, JD}, year={1999}, month={Nov}, pages={10092–10097} } @article{dattelbaum_martin_1999, title={Benzene-copper(I) coordination in a bimetallic chain complex}, volume={38}, ISSN={["1520-510X"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0000387767&partnerID=MN8TOARS}, DOI={10.1021/ic991064h}, abstractNote={The solvothermal reaction of CuCl and ZrCl(4) in benzene yields ((bz)CuCl(3))(2)Zr (1) (bz = eta(2)-benzene), which has been characterized by single-crystal X-ray diffraction with a = 6.1206(4) Å, b = 11.1242(4) Å, c = 13.6222(6) Å, beta = 93.675(3) degrees in the monoclinic space group P2(1)/m, Z = 2. 1 adopts a one-dimensional chain structure constructed from zirconium chloride octahedra and [(bz)CuCl(3)](2)(-) tetrahedra. The [(bz)CuCl(3)](2)(-) units are shown to be metal halide analogues of the phosphonate unit [RPO(3)](2)(-). Interchain interactions link chains of 1 along the crystallographic c direction via an edge-to-face pi-stacking of the coordinated benzene molecules. The crystal packing forces influence dramatic second-order Jahn-Teller distortions, making each of the two ((bz)CuCl(3))(2)(-) units distinct. These interactions further result in ligand-to-metal and metal-to-ligand charge transfers that cause an activation of the benzene ligands.}, number={26}, journal={INORGANIC CHEMISTRY}, author={Dattelbaum, AM and Martin, JD}, year={1999}, month={Dec}, pages={6200–6205} } @article{martin_1999, title={Beyond the Textbook: A First Year Introduction to Research at a Research I University}, volume={30}, journal={Crucible}, author={Martin, James}, year={1999}, pages={6–10} } @inproceedings{martin_1999, title={Copper Zirconium Chloride Materials from Zero to Three Dimensions}, author={Martin, J.D.}, year={1999}, month={Mar} } @inproceedings{martin_1999, title={From Crystal Structures to Liquid Crystals: Templated Extend Structure in Molten Metal Halides}, author={Martin, James}, year={1999}, month={Sep} } @book{martin_greenwood_1999, title={Halo-Zeotype Materials}, number={5,885,542}, author={Martin, J.D. and Greenwood, K.B.}, year={1999}, month={Mar} } @misc{martin_greenwood_1999, title={Halo-zeo-type materials}, volume={5,885,542}, number={1999 Mar. 23}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Martin, J. D. and Greenwood, K.}, year={1999} } @inproceedings{martin_thornton_1999, title={Liquid Crystalline Zinc Chloride}, volume={559}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0033322757&partnerID=MN8TOARS}, booktitle={Materials Research Society Symposium - Proceedings}, author={Martin, James and Thornton, T.A.}, year={1999}, pages={243–248} } @book{martin_1999, title={Luminescent Copper Aluminum Halide Materials}, number={5,876,637}, author={Martin, James}, year={1999}, month={Mar} } @misc{martin_1999, title={Luminescent copper aluminum halide materials}, volume={5,876,637}, number={1999 Mar. 2}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Martin, J. D.}, year={1999} } @book{martin_1999, title={Metal halide framework solids: Analogs of aluminosilicates and aluminophosphates}, volume={727}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0041911551&partnerID=MN8TOARS}, journal={ACS Symposium Series}, author={Martin, J.D.}, year={1999}, pages={28–38} } @book{martin_goettler_iton_badyal_1999, title={Neutron Diffraction Studies Of The Structure Of Templated Zinc Chloride-Type Glasses And Melts}, journal={Intense Pulsed Neutron Source Progress Report}, author={Martin, J.D. and Goettler, S.J. and Iton, L. and Badyal, Y.}, year={1999} } @book{euliss_martin_sullivan_goettler_hanson_1999, place={Upton, New York}, title={On The Hydration And Dehydration Of Zinc Chloride}, journal={National Synchrotron Light Source Activity Report}, institution={Brookhaven National Laboratory}, author={Euliss, L.E. and Martin, J.D. and Sullivan, R.M. and Goettler, S.J. and Hanson, J.}, year={1999} } @inproceedings{martin_1999, title={Putting Chemistry Back into Freshman Chemistry}, author={Martin, J.D.}, year={1999} } @inproceedings{sullivan_martin_1999, title={Understanding the photoluminescence of copper aluminum halide phosphors}, volume={560}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0033310103&partnerID=MN8TOARS}, booktitle={Materials Research Society Symposium - Proceedings}, author={Sullivan, R.M. and Martin, J.D.}, year={1999}, pages={39–44} } @article{dattelbaum_martin_1999, title={[H2NMe2]CuZrCl6: Hydrogen-bond induced distortions in a copper zirconium chloride analogue of a thiophosphate}, volume={38}, ISSN={["0020-1669"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0000236338&partnerID=MN8TOARS}, DOI={10.1021/ic9811906}, abstractNote={The copper(I) zirconium(IV) halide, [H2NMe2]CuZrCl6 (1), has been synthesized, and its single-crystal X-ray structure was determined. The crystal undergoes a phase transition at −60 °C giving a room-temperature structure with a = 10.1105(6) A, b = 9.9463(5) A, c = 12.7254(8) A, β = 110.287(5)° in the monoclinic space group C2/c, Z = 4, and a low-temperature structure (−116 °C) with a = 10.234(2) A, b = 9.427(1) A, c = 12.691(2) A, β = 109.90(2)° in the monoclinic space group P21/c, Z = 4. [H2NMe2]CuZrCl6 is constructed from unique one-dimensional chains with zirconium and copper in alternating octahedral and tetrahedral coordination environments, respectively. The structural relationship between (CuCl4)3- and (PS4)3- is demonstrated by the analogy of this structure to that of KNiPS4. The phase transition, which occurs at approximately −60 °C, results in altered configurations of the dimethylammonium to metal−chloride hydrogen bonding. In addition, a remarkable distortion in the cuprous chloride tetrahedra...}, number={10}, journal={INORGANIC CHEMISTRY}, author={Dattelbaum, AM and Martin, JD}, year={1999}, month={May}, pages={2369–2374} } @article{uma_martin_corbett_1999, title={α-K4R6I14Os (R = La, Pr): A novel iodine-rich structure with a layered network of electron-poor clusters. an incipient delocalized system with metal-like conductivity}, volume={38}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0000241058&partnerID=MN8TOARS}, number={17}, journal={Inorganic Chemistry}, author={Uma, S. and Martin, J.D. and Corbett, J.D.}, year={1999}, pages={3825–3830} } @article{martin_1998, title={Beyond the Textbook: A First-Year Introduction to Research at a Research I University}, volume={75}, ISSN={0021-9584 1938-1328}, url={http://dx.doi.org/10.1021/ed075p325}, DOI={10.1021/ed075p325}, abstractNote={The project "Beyond the Textbook", is designed to provide second semester undergraduate students firsthand exposure to chemical research. In this project, student teams become investigative reporters assigned to learn the workings of a chemistry research group. This project involves interviewing professors, graduate students and postdocs about their research, and where possible shadowing researchers in the laboratory. At the conclusion of this project, student teams write a feature news article and give a fifteen minute oral presentation. By placing students in an active research setting, the educational focus is shifted from the professor "making the subject matter relevant," to the professor providing the opportunity for students to be engaged in relevant subject matter.}, number={3}, journal={Journal of Chemical Education}, publisher={American Chemical Society (ACS)}, author={Martin, James D.}, year={1998}, month={Mar}, pages={325} } @book{wertz_martin_1998, place={Hillsborough, NC, USA}, title={Chemistry: A Quantitative Science}, publisher={Patterson/Jones Publishing}, author={Wertz, D.W. and Martin, James}, year={1998} } @article{martin_dattelbaum_thornton_sullivan_yang_peachey_1998, title={Metal Halide Analogues of Chalcogenides: A Building Block Approach to the Rational Synthesis of Solid-State Materials}, volume={10}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0542398826&partnerID=MN8TOARS}, number={10}, journal={Chemistry of Materials}, author={Martin, J.D. and Dattelbaum, A.M. and Thornton, T.A. and Sullivan, R.M. and Yang, J. and Peachey, M.T.}, year={1998}, pages={2699–2713} } @misc{martin_dattelbaum_thornton_sullivan_yang_peachey_1998, title={Metal halide analogues of chalcogenides: A building block approach to the rational synthesis of solid-state materials}, volume={10}, ISSN={["1520-5002"]}, DOI={10.1021/cm9802550}, abstractNote={Principles of solid-state structure and bonding that relate metal-halide and metal-chalcogenide materials are described through a comparison of binary AXn salts. Structural variation is rationalized by a comparison of the size and charge of the respective ions, the d-electron count of the cations, and the type of A−X, A−A, and X−X bonding interactions. These general bonding considerations are exploited for the construction of new metal-halide structure types that are patterned after known chalcogenide structures such as metal-halide analogues of silicates, aluminosilicates, phosphates, and phosphonates.}, number={10}, journal={CHEMISTRY OF MATERIALS}, author={Martin, JD and Dattelbaum, AM and Thornton, TA and Sullivan, RM and Yang, JC and Peachey, MT}, year={1998}, month={Oct}, pages={2699–2713} } @article{hong_martin_corbett_1998, title={New Condensed Cluster Structure with Triple Metal Layers: La2INi2 and La2ICu2· Synthesis, Structure, and Bonding}, volume={37}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0002565974&partnerID=MN8TOARS}, number={13}, journal={Inorganic Chemistry}, author={Hong, S.-T. and Martin, J.D. and Corbett, J.D.}, year={1998}, pages={3385–3390} } @book{sullivan_martin_liu_grey_hanson_1998, place={Upton, New York}, title={Observation of Reactive Intermediates on Sorption of Ethylene into CuAlCl4}, journal={National Synchrotron Light Source Activity Report}, institution={Brookhaven National Laboratory}, author={Sullivan, R.M. and Martin, J.D. and Liu, H. and Grey, C.P. and Hanson, J.}, year={1998} } @inproceedings{martin_wertz_1998, title={Putting Chemistry Back into General Chemistry}, author={Martin, J.D. and Wertz, D.W.}, year={1998} } @inproceedings{martin_1998, title={Templated Zinc Chloride: From Open Frameworks to Liquid Crystals}, author={Martin, James}, year={1998} } @article{martin_leafblad_1998, title={The hydrogen-bonded framework of the first anti-zeotype: [{(H2NEt2)2}2(CuCl4)][AlCl4]}, volume={37}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0032542384&partnerID=MN8TOARS}, DOI={10.1002/(sici)1521-3773(19981217)37:23<3318::aid-anie3318>3.0.co;2-y}, abstractNote={A two-coordinate cationic link between [CuCl4 ]3- tetrahedra by means of two inversion-related dialkylammonium cations yields the hydrogen-bonded A2 X anti-cristobalite framework [{(H2 NEt2 )2 }2 (CuCl4 )]+ . This novel cationic framework is constructed around space-filling and templating [AlCl4 ]- anions resulting in large pores (16.6×6.7 Å).}, number={23}, journal={Angewandte Chemie - International Edition}, author={Martin, James and Leafblad, B. R.}, year={1998}, pages={3318–3320} } @article{martin_leafblad_sullivan_boyle_1998, title={alpha- and beta-CuAlCl4: Framework construction using corner-shared tetrahedral metal-halide building blocks}, volume={37}, ISSN={["0020-1669"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0001208954&partnerID=MN8TOARS}, DOI={10.1021/ic971148v}, abstractNote={Rapid quenching of a melt of CuCl and AlCl(3) results in the formation of the metastable framework structure, beta-CuAlCl(4). The structure, determined by single-crystal X-ray crystallography (space group Pna2(1), a = 12.8388(5) Å, b = 7.6455(3) Å, and c = 6.1264(3) Å, Z = 2), can be derived from a distorted hexagonal closest packed anion sublattice. Annealing at temperatures above 100 degrees C results in a phase transition to the more thermodynamically stable alpha-CuAlCl(4). The solid solution CuAlCl(4)(-)(x)()Br(x)() is described for both alpha and beta phases. The structures of alpha-CuAlCl(4) and alpha-CuAlBr(4), determined by single-crystal X-ray diffraction (space group P&fourmacr;2c, a = b 5.4409(1) Å and c = 10.1126(3) Å, V = 299.37(1) Å(3), Z = 2, and a = b = 5.7321(2) Å and c = 10.6046(8) Å, Z = 2, respectively), are derived from a distorted cubic closest packed anion sublattice. The mechanism for this phase transition is described in relation to that previously described for cristobalite-type structures. The structures of both alpha- and beta-CuAlCl(4) reveal large van der Waals channels, which are proposed to be important for the reversible adsorption of carbon monoxide and ethylene by these materials.}, number={6}, journal={INORGANIC CHEMISTRY}, author={Martin, JD and Leafblad, BR and Sullivan, RM and Boyle, PD}, year={1998}, month={Mar}, pages={1341–1346} } @inproceedings{martin_1997, title={HALOZEOTYPES: A Light at the End of the Tunnel}, author={Martin, James}, year={1997}, month={Jun} } @inproceedings{martin_1997, title={Halozeotypes: A New Generation of Zeolite-type Materials}, author={Martin, James}, year={1997}, month={Sep} } @article{martin_greenwood_1997, title={Halozeotypes: a new generation of zeolite-type materials}, volume={36}, ISSN={["0570-0833"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0030779206&partnerID=MN8TOARS}, DOI={10.1002/anie.199720721}, abstractNote={The first non-oxide, direct analogues of aluminosilicate zeolites are materials with the anionic partial structure [CunZnm–nCl2m]n−. Varying the templating alkylammonium counterion results in different framework structures: [HNMe3][CuZn5Cl12] adopts the known sodalite structure, whereas [H2NEt2][CuZn5Cl12] exhibits a novel three-dimensional channel structure with eleven- and eight-ring channels (the latter is depicted on the right). Controlled addition of methanol or water results in formation of colloidal particles that are implicated as intermediates in the construction of open frameworks.}, number={19}, journal={ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH}, author={Martin, JD and Greenwood, KB}, year={1997}, month={Oct}, pages={2072–2075} } @book{liu_cirolo_grey_hanson_martin_sullivan_1997, place={Upton, New York}, title={In-Situ Studies of Ethylene Sorption in CuAlCl4}, journal={National Synchrotron Light Source Activity Report}, institution={Brookhaven National Laboratory}, author={Liu, H. and Cirolo, M.F. and Grey, C.P. and Hanson, J. and Martin, J.D. and Sullivan, R.M.}, year={1997} } @inbook{martin_1997, place={Hillsborough, NC.}, title={Inorganic Chemistry}, booktitle={Chemistry: A molecular science}, publisher={Patterson/Jones Publishing:}, author={Martin, James}, editor={Wertz, D.W.Editor}, year={1997} } @inbook{martin_1997, place={Hillsborough, NC.}, title={States of Matter}, booktitle={Chemistry A Molecular Science}, publisher={Patterson/Jones Publishing:}, author={Martin, J.D.}, editor={Wertz, D.W.Editor}, year={1997} } @article{steinwand_corbett_martin_1997, title={Syntheses, crystal structures, and magnetic properties of Sc(19)Br(28)Z(4) compounds with Z = Mn, Fe, Ru, or Os. Structural and bonding trends in R(16)X(20)Z(4)-type oligomers}, volume={36}, ISSN={["1520-510X"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-4243823087&partnerID=MN8TOARS}, DOI={10.1021/ic970881j}, abstractNote={The title compounds are obtained from reactions of the appropriate proportions of Sc, ScBr3, and elemental Z in sealed Nb tubing at 800−900 °C. The structures with Z = Mn, Ru, Os were established by single crystal means to be Sc-deficient examples of the Gd4I84+(Gd16I20Mn44-) structure (cubic P43m, Z = 1, a = 10.941(9), 10.9897(5), 11.0032(3) A) with 3.6(1), 3.0(1), and 2.9(1) scandium atoms in the tetrahedral cation portion, respectively. The cation deficiency with Z = Ru, Os affords 61-electron Sc16Br20Z4 oligomeric units relative to the closed-shell expectation of 60 e-. The dimensions, proportions, and bond orders in the Sc16Br20Z4 oligomers (S4 symmetry) are compared with those in the four yttrium and one gadolinium examples previously known in this or other structure types. The Sc−Mn combination again displays the longest Sc−Z distances. A systematic breathing distortion of R16X20Z4 clusters that increases in the order Y−I, Y−Br, Sc−Br(Ru,Os,Ir) to Sc−Br−Mn and Gd−I−Mn parallels many other comparis...}, number={27}, journal={INORGANIC CHEMISTRY}, author={Steinwand, SJ and Corbett, JD and Martin, JD}, year={1997}, month={Dec}, pages={6413–6422} } @article{park_martin_corbett_1997, title={Three Types of Condensed Cluster Phases of Rare-Earth Metal Iodides with Transition Metal Interstitials: Pr4I5Ni, Pr3I3Os, Pr2INi2, and La2IZ2}, volume={129}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0001295295&partnerID=MN8TOARS}, DOI={10.1006/jssc.1996.7246}, abstractNote={Abstract Syntheses of the title compounds result from appropriate reactions of the elements and RI 3 ( R =La, Pr) in sealed Nb containers at, variously, 800–990°C. The structures of three were detailed by single crystal X-ray diffraction: Pr 4 I 5 Ni, Pmmn , Z =2, R ( F )/ R w =3.6/5.3%; Pr 3 I 3 Os, P 2 1 / m , Z =2, R / R w 2.4/2.8%; Pr 2 INi 2 , P 6 3 / mmc , Z =2, R / R w =2.2/3.6. The new compounds La 2 I Z 2 , Z =Fe, Co, Ru, Os, were shown to be isostructural with Pr 2 INi 2 (Gd 2 IFe 2 ) by Guinier powder diffraction. Pr 4 I 5 Ni, the first orthorhombic example among the R 4 I 5 Z series, consists of R 6 Z octahedra condensed into chains. The new example contains the most extreme R : Z size proportions and clearly lacks the strong dπ – dπ bonding between Z and apical R seen within other members. Pr 3 I 3 Os, previously known only with a cubic Gd 3 Cl 3 C-(Ca 3 I 3 P-)-type structure, also occurs as a relatively undistorted member of the monoclinic Pr 3 I 3 Ru (double chain) family. Apical Pr–Os π -bonding appears significant, with Pr–Os distances that are 0.24 A shorter than the average within the waist of the parent octahedra. The R 2 I Z 2 phases expand the number of examples of the unusual Gd 2 IFe 2 structure, which contains AlB 2 -like slabs; namely, graphite-like Z 2 nets between eclipsed pairs of R layers that are in turn separated by single iodine layers. Notable distances in Pr 2 INi 2 are Ni–Ni, 2.36 A, and Pr–Ni, 2.98 A. Charge-consistent, extended Huckel band calculations in La 2 IFe 2 (in contrast with results reported for Gd 2 IFe 2 ) demonstrate a strong mixing of La–Fe and Fe–Fe bonding in a partially filled band, the Fe states on balance falling only slightly below those of La.}, number={2}, journal={Journal of Solid State Chemistry}, author={Park, Y. and Martin, J.D. and Corbett, J.D.}, year={1997}, pages={277–286} } @article{lulei_martin_hoistad_corbett_1997, title={Two closely related structure types with unprecedented bioctahedral rare-earth-metal clusters centered by transition metals: A2R10I17Z2 (A = Rb, Cs; R = La, Ce, Pr; Z = Co, Ni, Ru, Os) and La10I15Os2}, volume={119}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0031036601&partnerID=MN8TOARS}, DOI={10.1021/ja9630607}, abstractNote={A family of compounds has been discovered in which pairs of octahedral rare-earth-metal clusters, each centered by a late transition metal Z, share a common edge. This R{sub 10}Z{sub 2} units, sheathed and interbridged by iodine atoms, occur in the quaternary phases Rb{sub 2}La{sub 10}I{sub 17}Co{sub 2}, Cs{sub 2}La{sub 10}I{sub 17}Z{sub 2} (Z = Co, Ni, Ru, Os), Cs{sub 2}Ce{sub 10}I{sub 17}Os{sub 2}, and Cs{sub 2}Pr{sub 10}I{sub 17}Z{sub 2}(Z = Co, Ru, Os) and in the ternary La{sub 10} I{sub 15}Os{sub 2}. All are obtained as black, air-sensitive crystals from reactions of RI{sub 3}, R, Z, and RbI or CsI as appropriate in welded Nb containers at 800-850{degree}C. The structure of Cs{sub 2} Ce{sub 10}I{sub 17}Os{sub 2} has been refined by single-crystal X-ray diffraction methods for comparison with the isotypic Cs{sub 2}La{sub 10}I{sub 17}Co{sub 2}, and the structure of a unique ternary La{sub 10}I{sub 15}Os{sub 2} has been defined. These new bioctahedral clusters may be regarded as the missing links between discrete clusters and infinite chains of condensed octahedral clusters among rare-earth-metal cluster halides that are stabilized by interstitial transition metals. The biclusters in both structures are extensively interconnected into three-dimensional arrays through bridging iodine atoms. The structural interconversion betweenmore » Cs{sub 2}La{sub 10}I{sub 17}Os{sub 2} and La{sub 10}I{sub 15}Os{sub 2} + 2CsI may be easily visualized in terms of changes in iodide bridging modes and accommodation of cesium cations. 29 refs., 7 figs., 7 tabs.« less}, number={3}, journal={Journal of the American Chemical Society}, author={Lulei, M. and Martin, J.D. and Hoistad, L.M. and Corbett, J.D.}, year={1997}, pages={513–520} } @inproceedings{martin_greenwood_1996, title={Halozeolites}, author={Martin, James and Greenwood, K.B.}, year={1996}, month={Jul} } @inproceedings{martin_1996, title={Metal Halide Analogs of Zeolites}, author={Martin, James}, year={1996}, month={Aug} } @article{lulei_martin_corbett_1996, title={Two new examples for the unusual R12L17z2-structure type: La12i17fe2 and ce12i17mn2}, volume={125}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0000979890&partnerID=MN8TOARS}, DOI={10.1006/jssc.1996.0293}, abstractNote={Abstract Reactions of KI, La, LaI3, and Fe in niobium tubes at 900°C yield black crystals of La12I17Fe2which were characterized by single-crystal X-ray diffraction (triclinic,P1,Z= 1,a= 11.967(8),b= 11.851(6),c= 9.918(7) A, α = 114.59(5)°, β = 104.83(6)°, γ = 93.05(5)°,R(F)/Rw= 3.8/4.3%). Similar experiments also gave the isostructural Ce12I17Mn2according to the Guinier powder pattern (a= 11.863(6),b= 11.840(6),c= 9.857(5) A, α = 14.90(4)°, β = 104.47(4)°, γ = 93.28(4)°). The Pr12I17Fe2-type structure contains octahedral rare-earth-metal cluster units R6centered by a transition-metal atomZand sheathed by iodine atoms. These are closely linked by seven Ii−iand one Ii−a−abridges that lead to the unusually low I:Pr ratio for phases with isolated clusters. The compounds reported here together with Pr12I17Z2,Z= Fe, Re are the only phases known to adopt this structure type. The La12I17Fe2phase formally has 17.5eper cluster, and its magnetic susceptibility data are consistent with equal numbers of 17-eand 18-e(closed shell) clusters, with μ = 1.11 BM for the former.}, number={2}, journal={Journal of Solid State Chemistry}, author={Lulei, M. and Martin, J.D. and Corbett, J.D.}, year={1996}, pages={249–254} } @article{martin_hess_1996, title={β-Mn(O2CMe)2: Solvothermal synthesis and crystal structure of an unprecedented three-dimensional manganese(II) network}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0003780601&partnerID=MN8TOARS}, number={21}, journal={Chemical Communications}, author={Martin, J.D. and Hess, R.F.}, year={1996}, pages={2419–2420} } @article{martin_corbett_1995, title={LaI: An unprecedented binary rare earth metal monohalide with a NiAs-type structure}, volume={34}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-33748243417&partnerID=MN8TOARS}, number={2}, journal={Angewandte Chemie (International Edition in English)}, author={Martin, J.D. and Corbett, J.D.}, year={1995}, pages={233–235} } @inproceedings{martin_hess_1995, title={Solvothermal Synthesis of Anhydrous Mn(II) Extended Solids}, author={Martin, James and Hess, R.M.}, year={1995}, month={Sep} } @article{johnson_folting_streib_martin_huffman_jackson_eisenstein_caulton_1995, title={π-Stabilized, yet reactive, half-sandwich Cp*Ru(PR3)X compounds: Synthesis, structure, and bonding}, volume={34}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-33751154664&partnerID=MN8TOARS}, number={2}, journal={Inorganic Chemistry}, author={Johnson, T.J. and Folting, K. and Streib, W.E. and Martin, J.D. and Huffman, J.C. and Jackson, S.A. and Eisenstein, O. and Caulton, K.G.}, year={1995}, pages={488–499} } @article{wang_tsai_folting_martin_hendrickson_christou_1994, title={Covalent linkage of [Mn4O2(O2CPh) 6(dbm)2] into a dimer and a one-dimensional polymer (dbmH = dibenzoylmethane)}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-37049067923&partnerID=MN8TOARS}, DOI={10.1039/C39940000671}, abstractNote={Methods have been developed for covalently linking [Mn4O2(O2CPh)6(dbm)2]2(dbmH = dibenzoylmethane) units to give a dimer and a polymer; treatment of 2 with trans-1,2-bis(4-pyridyl)ethene (bpe) or 4,4′-bipyridine (4,4′-bpy) yields [Mn4O2(O2CPh)6(dbm)2(bpe)]24 and [Mn4O2(O2CPh)6(dbm)2(4,4′-bpy)]n5, respectively.}, number={5}, journal={Journal of the Chemical Society, Chemical Communications}, author={Wang, S. and Tsai, H.-L. and Folting, K. and Martin, J.D. and Hendrickson, D.N. and Christou, G.}, year={1994}, pages={671–673} } @article{ebihara_martin_corbett_1994, title={Novel chain and oligomeric condensed cluster phases for gadolinium Iodides with manganese interstitials}, volume={33}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0001237670&partnerID=MN8TOARS}, number={10}, journal={Inorganic Chemistry}, author={Ebihara, M. and Martin, J.D. and Corbett, J.D.}, year={1994}, pages={2079–2084} } @article{martin_canadell_fitzmaurice_slawin_williams_woollins_1994, title={Preparation, crystal structures, conductivities and electronic structures of [et]3[NiCl4]·H2O and [et]3[AuBr4] [et = bis(ethylenedithio)tetrathiafulvalene]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-37049066690&partnerID=MN8TOARS}, DOI={10.1039/DT9940001995}, abstractNote={Single-crystal studies of [et]3[NiCl4]·H2O and [et]3[AuBr4][et = bis(ethylenedithio)tetrathiafulvalene] have revealed distinctly different packing motifs associated with the different anions. The nickel compound contains a sheet stack structure whilst the gold compound has a herringbone stack of et molecules. The stacking properties are discussed in the context of conductivity and band-theory calculations. The nickel compound exhibits metallic behaviour at room temperature.}, number={13}, journal={Journal of the Chemical Society, Dalton Transactions}, author={Martin, J.D. and Canadell, E. and Fitzmaurice, J.C. and Slawin, A.M.Z. and Williams, D.J. and Woollins, J.D.}, year={1994}, pages={1995–2004} } @article{chisholm_haubrich_martin_streib_1994, title={Stepwise activation of σ-thienyl ligands at di-tungsten centres}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-37049075190&partnerID=MN8TOARS}, DOI={10.1039/C39940000683}, abstractNote={The attachment of σ-2-thienyl and σ-2-benzothienyl ligands (but not σ-3-thiophenyl ligands) to W26+ containing centres leads to the stepwise opening of the five-membered ring to generate, in the presence of tert-butyl alcohol, a novel thiolato-µ-alkylidyne metallocylcle in W2(OBut)5(µ-SC4H3)(η1-2-SC4H3), which has been structurally characterized; the intermediate W2(OBut)4(µ-SC4H3)(η1-2-SC4H3), which contains a bridging thiolato–vinylidene metallocycle has been characterized by NMR spectroscopy.}, number={6}, journal={Journal of the Chemical Society, Chemical Communications}, author={Chisholm, M.H. and Haubrich, S.T. and Martin, J.D. and Streib, W.E.}, year={1994}, pages={683–684} } @article{vaartstra_samuels_barash_martin_streib_gasser_caulton_1993, title={A comparison of heterometallic alkoxide molecules containing copper(I) or copper(II) and zirconium}, volume={449}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0006936601&partnerID=MN8TOARS}, DOI={10.1016/0022-328X(93)80123-S}, abstractNote={The synthesis, characterization and structure and thermal decomposition of ClCuIIZr2(OiPr)9 (1) and Cu2IZr2(OiPr)10 (2) are reported. Compound 1 has a CuZr2(μ3-OR)2(μ2-OR)3 central core, with chloride as a terminal ligand on copper. This paramagnetic CuII species is particularly interesting in that the 1H NMR signals of those alkoxides which are μ2- and μ3-bridged to copper undergo paramagnetic shifts (to 8.66 and 10.41 ppm at 25°C), but those of the remaining alkoxide groups are unperturbed from the region characteristic of the Zr2(OiPr)9− unit. Compound 2 consists of a Zr2(OiPr)9− face-sharing bioctahedron with two μ2-alkoxides bridging to a Cu2IOR+ fragment giving the copper a linear two-coordinate environment. Both 1 and 2 are highly soluble in hydrocarbon solvents. TGA studies of both compounds reveal information on possible mechanisms and products of thermolysis.}, number={1-2}, journal={Journal of Organometallic Chemistry}, author={Vaartstra, B.A. and Samuels, J.A. and Barash, E.H. and Martin, J.D. and Streib, W.E. and Gasser, C. and Caulton, K.G.}, year={1993}, pages={191–201} } @article{castro_martin_christou_1993, title={A new vanadium(V) persulfide complex: (NEt4)[VO(S2)2(bpy)]}, volume={32}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0000312966&partnerID=MN8TOARS}, number={13}, journal={Inorganic Chemistry}, author={Castro, S.L. and Martin, J.D. and Christou, G.}, year={1993}, pages={2978–2980} } @article{chisholm_johnston_martin_lobkovsky_huffman_1993, title={A tetranuclear tungsten carbido alkoxide cluster with a hydride ligand: W4(μ-C)(NMe)(OCH2But)11(H)}, volume={4}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-33748533735&partnerID=MN8TOARS}, DOI={10.1007/BF00702712}, number={2}, journal={Journal of Cluster Science}, author={Chisholm, M.H. and Johnston, V. and Martin, J.D. and Lobkovsky, E. and Huffman, J.C.}, year={1993}, pages={105–117} } @article{chisholm_cook_huffman_martin_1993, title={Carbon-carbon coupling of a μ-ethynyl ligand with an isocyanide at a ditungsten center. Preparation and structure of W2(μ-CCCNHXyl)(OSiMe2BUt) 5(CNXyl)4, where Xyl = 2,6-Me2C6H3}, volume={12}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0011476262&partnerID=MN8TOARS}, number={6}, journal={Organometallics}, author={Chisholm, M.H. and Cook, C.M. and Huffman, J.C. and Martin, J.D.}, year={1993}, pages={2354–2359} } @article{bouwman_caulton_christou_folting_gasser_hendrickson_huffman_lobkovsky_martin_michel_et al._1993, title={Doubly-hydrated hexafluoroacetylacetone as a tetradentate ligand: Synthesis, magnetochemistry, and thermal transformations of a MnIII 2 complex}, volume={32}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0001208732&partnerID=MN8TOARS}, number={16}, journal={Inorganic Chemistry}, author={Bouwman, E. and Caulton, K.G. and Christou, G. and Folting, K. and Gasser, C. and Hendrickson, D.N. and Huffman, J.C. and Lobkovsky, E.B. and Martin, J.D. and Michel, P. and et al.}, year={1993}, pages={3463–3470} } @article{martin_canadell_becker_bernstein_1993, title={Structural and electronic study of donors composed of two TTF moieties linked by tellurium bridges}, volume={5}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0000673352&partnerID=MN8TOARS}, number={9}, journal={Chemistry of Materials}, author={Martin, J.D. and Canadell, E. and Becker, J.Y. and Bernstein, J.}, year={1993}, pages={1199–1203} } @article{chisholm_folting_haubrich_martin_1993, title={Triple bonds between tungsten atoms with ancillary dimesitylboroalkoxide ligands. Preparations, properties and structures of W2(NMe2)4[OB(Mes)2]2 and W2(OBut)4[OB(Mes)2]2}, volume={213}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0013399462&partnerID=MN8TOARS}, DOI={10.1016/S0020-1693(00)83809-8}, abstractNote={From the reaction between W2(NMe2)6 and dimesitylborinic acid, (Mes)2BOH (2 equiv.), in toluene, the golden- yellow crystalline compound W2(NMe2)4[OB(Mes)2]2 (1) has been isolated and characterized (elemental analysis, 1H, 13C{1H}, 11B NMR spectroscopy, IR spectroscopy and a single crystal X-ray diffraction study). At −160 °C, a=39.379(7), b=13.649(2), c=21.918(4) Å, β=123.12(1)°, Z=8 and space group C2/c. The compound W2(OBut)4[OB(Mes)2]2 (2) has been similarly characterized as a dark red crystalline compound obtained from the reaction between W2(OBut)6 and (Mes)2BOH (2 equiv.) in toluene. At −159 °C, a=17.164(2), b=19.773(2), c=18.490(2) Å, β=102.91(1)°, Z=4 and space group C2. In both compounds there are unsupported WW bonds of distance 2.3068(13) and 2.3521(15) Å for compound 1 and 2, respectively. In 1 there is a central ethane like W2N4O2 core with the gauche conformation, WN=1.94(2) (av.) and WO=1.93(1) Å. The coordination geometry at nitrogen is trigonal planar and the NC2 units are aligned along the WW axis as found for related compounds. In compound 2 the W2O4O′2 skeleton is eclipsed and most surprisingly the WO′ distances to the OB(Mes)2 ligands are shorter 1.81(1) Å than the WO distances 1.94(1) and 1.90(1) Å to the alkoxide ligands. In both 1 and 2 the coordination geometry at boron is trigonal planar and the OB distances fall in the range 1.37(3)–1.41(3) Å, and are statistically equivalent to that of the free borinic acid. Compound 2 has crystallographically imposed C2 symmetry and the OB(Mes)2 groups are syn. These are the first structurally characterized boroalkoxides coordinated to the (WW)6+ moiety and comparisons of WO π bonding are made with respect to related OR and OSiR3 compounds.}, number={1-2}, journal={Inorganica Chimica Acta}, author={Chisholm, M.H. and Folting, K. and Haubrich, S.T. and Martin, J.D.}, year={1993}, pages={17–24} } @article{budzichowski_chisholm_martin_huffman_moodley_streib_1993, title={Two new structural types for d3-d3 dimers of molybdenum and tungsten: [K(18-crown-6)]+[Mo2(OCH2But)7]- and [W2{P(c-hexyl)2}3(OCH2But)3{HP(c-hexyl)2}]}, volume={12}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-1842778695&partnerID=MN8TOARS}, DOI={10.1016/S0277-5387(00)81733-7}, abstractNote={Abstract The syntheses and structures (determined by single-crystal X-ray diffraction techniques) are reported for [K(18-crown-6)]+[Mo2(OCH2But)7]− and [W2{P(c-hexyl)3}3(OCH2But3{HP(c-hexyl)2}]. The former contains a single bridging (μ-OCH2But) ligand, six terminal alkoxide ligands and an MM triple bond. The latter contains three bridging (μ-PR2) ligands and an MM bond distance that is most consistent with the presence of a single bond. These two compounds are the first examples of M2L7 complexes with bridging ligands. They highlight the delicate balance of metal-metal vs metal-ligand bonding in the coordination chemistry of d3-d3 dimers of molybdenum and tungsten.}, number={3}, journal={Polyhedron}, author={Budzichowski, T.A. and Chisholm, M.H. and Martin, J.D. and Huffman, J.C. and Moodley, K.G. and Streib, W.E.}, year={1993}, pages={343–345} } @article{barry_chacon_chisholm_folting_martin_1993, title={[Et3PH][W4O3Cl7(PEt3)3]. A 12-electron tetrahedral tungsten cluster with an interesting arrangement of ligands}, volume={4}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-34250081873&partnerID=MN8TOARS}, DOI={10.1007/BF00703742}, number={3}, journal={Journal of Cluster Science}, author={Barry, J.T. and Chacon, S.T. and Chisholm, M.H. and Folting, K. and Martin, J.D.}, year={1993}, pages={259–269} } @article{a construction principle of the κ-phase based on the efficient (o-h)donor · · · oanion structural functionality: the examples of κ-(edt-ttf(ch2oh))2x (x = clo4 ⊖ and reo4 ⊖)_1992, volume={4}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-11944257142&partnerID=MN8TOARS}, number={9}, journal={Advanced Materials}, year={1992}, pages={579–581} } @article{martin_canadell_batail_1992, title={Molecular interactions, band structure, and BEDT-TTF oxidation states in the molecular conductor (BEDT-TTF)3[V(dmit)3]2}, volume={31}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0001391597&partnerID=MN8TOARS}, number={14}, journal={Inorganic Chemistry}, author={Martin, J.D. and Canadell, E. and Batail, P.}, year={1992}, pages={3176–3178} } @article{martin_chisholm_1992, place={New York, NY}, title={Synthesis of Hexakis(dimethylamide)ditungsten}, volume={29}, journal={Inorganic Syntheses}, publisher={John Wiley & Sons}, author={Martin, J.D. and Chisholm, M.H.}, year={1992}, pages={137–140} } @article{buhro_chisholm_folting_huffman_martin_streib_1992, title={The tungsten-tungsten triple bond. 17.1 mixed amido-phosphido compounds of formula M2(PR2)2(NMe2)4. Comparisons of amido and phosphido ligation and bridged and unbridged isomers}, volume={114}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0000124969&partnerID=MN8TOARS}, number={2}, journal={Journal of the American Chemical Society}, author={Buhro, W.E. and Chisholm, M.H. and Folting, K. and Huffman, J.C. and Martin, J.D. and Streib, W.E.}, year={1992}, pages={557–570} } @article{chisholm_kramer_martin_huffman_lobkovsky_streib_1992, title={The tungsten-tungsten triple bond. 19. Preparation and characterization of W2 6+-containing compounds supported by amide/alkoxide and trifluoromethanesulfonate ligands}, volume={31}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0001603530&partnerID=MN8TOARS}, number={22}, journal={Inorganic Chemistry}, author={Chisholm, M.H. and Kramer, K.S. and Martin, J.D. and Huffman, J.C. and Lobkovsky, E.B. and Streib, W.E.}, year={1992}, pages={4469–4474} } @article{batail_livage_parkin_coulon_martin_canadell_1991, title={Antiperovskite structure with ternary tetrathiafulvalenium salts: Construction, distortion, and antiferromagnetic ordering}, volume={30}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-33748215379&partnerID=MN8TOARS}, number={11}, journal={Angewandte Chemie (International Edition in English)}, author={Batail, P. and Livage, C. and Parkin, S.S.P. and Coulon, C. and Martin, J.D. and Canadell, E.}, year={1991}, pages={1498–1500} } @article{jackson_eisenstein_martin_albeniz_crabtree_1991, title={Understanding reactivity trends by structural and theoretical studies of distortions in ground-state reagents}, volume={10}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0001105120&partnerID=MN8TOARS}, number={9}, journal={Organometallics}, author={Jackson, S.A. and Eisenstein, O. and Martin, J.D. and Albeniz, A.C. and Crabtree, R.H.}, year={1991}, pages={3062–3069} } @article{martin_1990, title={A visible spectrometer}, volume={67}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-1842823713&partnerID=MN8TOARS}, number={12}, journal={Journal of Chemical Education}, author={Martin, J.D.}, year={1990}, pages={1061–1062} } @article{chisholm_hammond_huffman_martin_1990, title={Twelve-electron tetranuclear tungsten alkoxide clusters are not tetrahedral. Preparation, structure and bonding in W4(O)(OPri)10 and W4(O)(Cl)(OPri)9. Comparisons with the bonding in carbonyl clusters}, volume={9}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-33645587108&partnerID=MN8TOARS}, DOI={10.1016/S0277-5387(00)83995-9}, abstractNote={Addition of H2O (0.5 equiv) to a hexane/PriOH solution of W4(OPri)12 yields W4(O)(OPri)10 (II) which reacts further with NH4Cl to give W4(O)(Cl)(OPri)9 (I). The NMR data for I and II are indicative of common structural features and the molecular structure of I has been determined in the solid state by a single crystal X-ray diffraction study. At −146°C: a = 41.172(18), b = 9.185(2), c = 22.718(8) Å, β = 97.15(2)°, Z = 4 and dcalc = 2.113 g cm−3. A WCl(OPri) moiety caps a basal W3(μ-O)(μ-OPri)2(OPri)6 moiety. The local WO4 geometry for the tungsten atoms in the basal plane is square planar. Of particular note are the short WW distances involving the capping WCl(OPri) moiety (ca 2.45 Å) relative to those WW distances in the basal plane (ca 2.90 Å). The bonding in compounds I and II, modelled as W4(O)(Cl)(OH)9 and W4(O)(OH)10, respectively, has been investigated by MO calculations employing the method of Fenske and Hall. The combination of the d4-WCl(OH) fragment with the d8-W3(O)(OH)8 fragment yields multiple MM bond character between the capping tungsten atom and the three WW atoms in the basal plane. Interesting analogies are seen between carbonyl and alkoxide clusters based on the isolobal principle d3-W(OR)3 ↔ d9-Co(CO)3 ↔ d9-Os(CO)3− and d4-WX2 ↔ d10-PtL2. Specific comments are made with respect to the bonding in M4(OR)12 (M = Mo, W), M4(CO)12 (M = Co, Rh, Ir) (I, II) and Os3Pt(H)2(CO)(PR3).}, number={15-16}, journal={Polyhedron}, author={Chisholm, M.H. and Hammond, C.E. and Huffman, J.C. and Martin, J.D.}, year={1990}, pages={1829–1841} } @article{chisholm_folting_hammond_huffman_martin_1989, title={Comments on the Molecular Structure and Bonding In [W4Cl(O)(OiPr)9] and [W4(O)(OiPr)10]. Analogies with Tetranuclear Carbonyl Clusters}, volume={28}, ISSN={0570-0833 1521-3773}, url={http://dx.doi.org/10.1002/anie.198913681}, DOI={10.1002/anie.198913681}, abstractNote={Discovery of the 12-electron clusters 1 and 2 has afforded insights into the complementary bonding in clusters of early and late transition metals with alkoxide and carbonyl ligands, respectively. In 1, a WCl(OiPr) unit caps a triangular W3 fragment; similarly, in cluster 3, PtL2 caps an Os3 triangle. Compared with the d10 PtL2 fragment, however, the d4 WCl(OiPr) unit is a stronger electron acceptor. This leads to marked changes in the MM bond in the alkoxide/carbonyl clusters of the early/late transition metals.}, number={10}, journal={Angewandte Chemie International Edition in English}, publisher={Wiley}, author={Chisholm, Malcolm H. and Folting, Kirsten and Hammond, Charles E. and Huffman, John C. and Martin, James D.}, year={1989}, month={Oct}, pages={1368–1370} } @article{buhro_chisholm_martin_huffman_folting_streib_1989, title={Reactions involving carbon dioxide and mixed amido-phosphido dinuclear compounds: M2(NMe2)4(PR2) 2(M≡M), where M = Mo and W. Comparative study of the insertion of carbon dioxide into metal-nitrogen and metal-phosphorus bonds}, volume={111}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0040510142&partnerID=MN8TOARS}, number={21}, journal={Journal of the American Chemical Society}, author={Buhro, W.E. and Chisholm, M.H. and Martin, J.D. and Huffman, J.C. and Folting, K. and Streib, W.E.}, year={1989}, pages={8149–8156} } @article{chisholm_hampden-smith_huffman_martin_stahl_moodley_1988, title={The tungsten-tungsten triple bondXVI. Bis(cyclopentadienyl)- and bis(indenyl)tetradimethylamidoditungsten (WW)}, volume={7}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0001559905&partnerID=MN8TOARS}, DOI={10.1016/S0277-5387(00)80714-7}, abstractNote={Abstract From the reaction between 1,2-W2Cl2(NMe2)4 and NaCp (Cp = C5H5) (two equiv.) in toluene, a yellow-orange, hydrocarbon-soluble, crystalline solid of formula W2Cp2(NMe2)4 has been obtained. NMR data are consistent with a gauche 1,2- W2R2(NMe2)4 molecule having a WW triple bond and restricted rotations about the WN bonds. The NMR data, however, do not uniquely define the nature of the CpW bonding beyond the fact that there are five time-averaged equivalent carbon and hydrogen atoms. No crystals suitable for an X-ray study were obtained. The related reaction involving 1,2-W2Cl2(NMe2)4 and LiC9H7 (C9H7 = indenyl) (two equiv.) gave an orange, hydrocarbon-soluble, crystalline compound. The NMR data are indicative of a gauche 1,2- W2R2(NMe2)4 molecule in solution having a virtual C2 axis of symmetry and restricted rotations about the WN bonds. An X-ray study rev ealed the presence of the gauche rotamer and that the indenyl-metal bonding was η3-C9H7. Pertinent bond distances (A) and angles (°) for 1,2-W2(η3-C9H7)2(NMe2)4 are WW = 2.334(1), WN = 1.96(1) (av.), and W-η3-C3(indenyl) = 2.36(1)–2.54(1), WWN = 102(1) (av.) and WWC(η3-C3(indenyl)) = 91–117°. The reaction between 1,2-W2Cp2(NMe2)4 and EtCOOCOEt (> four equiv.) proceeds in hydrocarbon solvents to give the compound W2Cp2(NMe2)(O2CEt)3 and Me2NCOEt (three equiv.) in contrast to other 1,2-W2R2(NMe2)4 compounds which yield either W2(O2CEt)4 when R contains β-hydrogen atoms or W2R2(O2CEt)4 compounds. The molecular structure of W2Cp2(NMe2)(O2CEt)3 can be viewed as two fused four-legged piano-stools sharing an edge, μ-NMe2 and μ-η1-O2CEt, with a pair of bridging O 2CEt ligands spanning a WW bond of distance 2.78 A. The Cp ligands form W-η5-C5H5 bonds roughly trans to the WW axis.}, number={19-20}, journal={Polyhedron}, author={Chisholm, M.H. and Hampden-Smith, M.J. and Huffman, J.C. and Martin, J.D. and Stahl, K.A. and Moodley, K.G.}, year={1988}, pages={1991–1999} } @article{buhro_chisholm_folting_huffman_martin_streib_1988, title={Unbridged and bridged isomers of W2(PCy2)2(NMe2)4: preparations, characterizations, and comments on thermodynamic and activation parameters for the closing of phosphido bridges in d3-d3 dinuclear compounds}, volume={110}, ISSN={0002-7863 1520-5126}, url={http://dx.doi.org/10.1021/ja00227a047}, DOI={10.1021/ja00227a047}, abstractNote={Preparation et caracterisation structurale des isomeres W 2 (PCy 2 ) 2 (NMe 2 ) 4 . Conformation des isomeres et comportement en solution}, number={19}, journal={Journal of the American Chemical Society}, publisher={American Chemical Society (ACS)}, author={Buhro, William E. and Chisholm, Malcolm H. and Folting, Kirsten. and Huffman, John C. and Martin, James D. and Streib, William E.}, year={1988}, month={Sep}, pages={6563–6565} } @article{chisholm_conroy_martin_1987, title={NMR Spectroscopic and Theoretical Investigation of the Bonding in Ethylidyne capped tri-tungsten Nonaalkoxide and tricobalt Nonacarbonyl}, volume={97}, journal={Proceedings of the Indiana Academy of Science}, author={Chisholm, M.H. and Conroy, B.K. and Martin, James}, year={1987}, pages={189–194} }