@article{luo_maggard_2006, title={Hydrothermal Synthesis and Photocatalytic Activities of SrTiO3-Coated Fe2O3 and BiFeO3}, volume={18}, ISSN={0935-9648 1521-4095}, url={http://dx.doi.org/10.1002/adma.200500109}, DOI={10.1002/adma.200500109}, abstractNote={The photocatalysis of H 2 O into H 2 and O 2 via aqueous suspensions of metal-oxide powders has drawn increasing attention in recent years, as noted in several reviews. [1–3] Numerous solids (> 30) reportedly exhibit high quantum efficiencies (QEs) for H 2 O photocatalysis at ultraviolet wavelengths, including NaTaO 3 (56% QE), [4] Sr 2 Nb 2 O 7 (23%), [5] La 2 Ti 2 O 7 (27%), [6] and La 4 CaTi 5 O 17 (20%). [5a] The metal oxides are typically loaded with co-catalysts on their surfaces, such as Pt, NiO, or RuO 2 , as active sites for H 2 and/or O 2 production, and display catalytic rates that are stable for hundreds of hours and longer time spans. Contrasted to this has been the relative failure to obtain efficient photocatalysis for the visible (400–700 nm) and predominant region of the solar spectrum, as reported for a -Fe 2 O 3 ( ∼ 2%) or In 1– x Ni x TaO 4 (0.66%), [7,8] though the theoretical requirement for H 2 O → H 2 + 1/2 O 2 is k ≤ 1008 nm. [9] One limiting barrier is the requirement for a metal oxide to have a bandgap appropriate for the absorption of visible light ( ≤ 3.0 eV), while also having a conduction band edge, or flat-band potential, above the potential of the H 2 /H 2 O redox couple. [9,10] Empirical relationships have been formulated that predict a visible-light bandgap can only be obtained at the expense of high conduction band levels (with a few exceptions) in transition-metal oxides (e.g., E fb =2.94 – E g ; E fb = flat band potential, and must be <}, number={4}, journal={Advanced Materials}, publisher={Wiley}, author={Luo, J. and Maggard, P. A.}, year={2006}, month={Feb}, pages={514–517} }
 @article{yan_luo_dube_sefat_greedan_maggard_2006, title={Spin-Gap Formation and Thermal Structural Studies in Reduced Hybrid Layered Vanadates}, volume={45}, ISSN={0020-1669 1520-510X}, url={http://dx.doi.org/10.1021/ic0604563}, DOI={10.1021/ic0604563}, abstractNote={Reduced layered M(C4H4N2)V4O10 ((I, M = Co; II, M = Ni; III, M = Zn); C4H4N2 = pyrazine, pyz) hybrid solids were synthesized via hydrothermal reactions at 200-230 degrees C, and their structures determined by single-crystal X-ray diffraction (Cmcm, No. 63, Z = 4; a = 14.311(2), 14.2372(4), 14.425(1) A; b = 6.997(1), 6.9008(2), 6.9702(6) A; and c = 11.4990(8), 11.5102(3), 11.479(1) A; for I, II, and III, respectively). All three solids are isostructural and contain V4O102- layers condensed from edge- and corner-shared VO5 square pyramids. A single symmetry-unique V atom is reduced by 1/2 electron (on average) and bonds via its apical oxygen atom to interlayer Mpyz2+ chains. Magnetic susceptibility measurements show a strong temperature dependence and a Curie constant that is consistent with two randomly localized spins per V4O10(2-) formula for III. Further, the unusual discovery of a remarkably well-defined transition to a singlet ground state, as well as formation of a spin gap, is found for III at 22(1) K. The temperature-dependent electrical conductivities show apparent activation energies of 0.36 (I), 0.46 (II), and 0.59 eV (III). During heating cycles in flowing N2, the samples exhibit weight losses corresponding to the removal of predominantly pyrazine, pyrazine fragments, and CO2 via reaction of pyrazine with the vanadate layer. The complete removal of pyrazine without loss of crystallinity is found for well-ground samples of I and III. The SEM images of I and II after heating at 400-500 degrees C show relatively intact crystals, but at 600 degrees C further structural collapse results in the formation of macropores at the surfaces.}, number={13}, journal={Inorganic Chemistry}, publisher={American Chemical Society (ACS)}, author={Yan, Bangbo and Luo, Junhua and Dube, Paul and Sefat, Athena S. and Greedan, John E. and Maggard, Paul A.}, year={2006}, month={Jun}, pages={5109–5118} }
 @article{maggard_yan_luo_2005, title={Pillared hybrid solids with access to coordinatively unsaturated metal sites: An alternative strategy}, volume={44}, ISSN={["1521-3773"]}, DOI={10.1002/anie.200462715}, abstractNote={A layered effect: Replacement of pyrazine (A) with Co- or Ni-coordinated 2-pyrazinecarboxylate (pzc; B) between neutral AgReO4 layers (red and blue polyhedra) yields M(pzc)2(H2O)2AgReO4 (M=Co (shown) or Ni). This novel strategy is aimed at pillared solids with coordinated H2O that can be reversibly removed without causing structural collapse to give coordinatively unsaturated Ni and Co sites.}, number={17}, journal={ANGEWANDTE CHEMIE-INTERNATIONAL EDITION}, author={Maggard, PA and Yan, BB and Luo, JH}, year={2005}, pages={2553–2556} }
 @article{luo_alexander_wagner_maggard_2004, title={Synthesis and characterization of ReO4-containing microporous and open framework structures}, volume={43}, ISSN={["1520-510X"]}, DOI={10.1021/ic049609h}, abstractNote={A microporous and an open framework structure, [Cu(2)(pzc)(2)(H(2)O)(2)ReO(4)] (I) and [Cu(pzc)(H(2)O)ReO(4)].2H(2)O (II) (pzc = 2-pyrazinecarboxylate), respectively, have been prepared using hydrothermal methods and characterized using IR, TGA, and X-ray diffraction (I Pnma, No. 62, Z = 4, a = 7.4949(9) A, b = 24.975(3) A, c = 9.141(1) A; II P2(1)/c, No. 14, Z = 4, a = 8.5878(9) A, b = 12.920(1) A, c = 9.741(1) A, beta = 92.830(2) degrees ). I and II crystallize as red and blue solids, respectively, and each contains chains constructed from alternating Cu(pzc)(2)/ReO(4) oxide-bridged metal sites. The bidentate pzc ligand further bridges each -Cu-O-Re-O- chain to adjacent chains, via the Cu sites, to form a 3D net in I, with ellipsoidal channels that are approximately 3.3-4.7 A x 12.5 A, and in II, stacked layers of square nets with H(2)O-filled cavities that are approximately 4.4 x 5.1 A. Local ReO(4)(-) groups, a component of common oxidation catalysts, are directed at the channels and cavities of each structure, respectively. Thermogravimetric analysis indicates that I loses up to 64% of its H(2)O content before decomposition at 225 degrees C, while II loses approximately 100% of its H(2)O content by 265 degrees C.}, number={18}, journal={INORGANIC CHEMISTRY}, author={Luo, JH and Alexander, B and Wagner, TR and Maggard, PA}, year={2004}, month={Sep}, pages={5537–5542} }