Works (13)

Updated: July 5th, 2023 15:40

2021 article

Accessing the triplet manifold of naphthalene benzimidazole-phenanthroline in rhenium(I) bichromophores

Wells, K. A., Yarnell, J. E., Sheykhi, S., Palmer, J. R., Yonemoto, D. T., Joyce, R., … Castellano, F. N. (2021, August 11). DALTON TRANSACTIONS, Vol. 8.

By: K. Wells n, J. Yarnell n, S. Sheykhi n, J. Palmer n, D. Yonemoto n, R. Joyce n, S. Garakyaraghi n, F. Castellano n

TL;DR: The NBI-phen containing molecules exhibited enhanced visible light absorption with respect to their models and a rapid formation (<6 ns) of the triplet ligand-centred (LC) excited state of the organic ligand, N BI-phen. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 26, 2021

2021 journal article

Understanding the influence of geometric and electronic structure on the excited state dynamical and photoredox properties of perinone chromophores

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 23(42), 24200–24210.

By: K. Wells n, J. Palmer n, J. Yarnell n, S. Garakyaraghi n, B. Pemberton n, J. Favale n, M. Valchar n, A. Chakraborty n, F. Castellano n

TL;DR: A series of eight similarly structured perinone chromophores were synthesized and photophysically characterized to elucidate the electronic and structural tunability of their excited state properties, including excited state redox potentials and fluorescence lifetimes/quantum yields, and will be valuable for future use in photofunctional applications. (via Semantic Scholar)
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Sources: Web Of Science, ORCID, NC State University Libraries
Added: October 26, 2021

2020 journal article

TIPS-pentacene triplet exciton generation on PbS quantum dots results from indirect sensitization

Chemical Science, 11(22), 5690–5696.

By: C. Papa n, S. Garakyaraghi n, D. Granger*, J. Anthony* & F. Castellano n

TL;DR: Many fundamental questions remain in the elucidation of energy migration mechanisms across the interface between semiconductor nanomaterials and molecular chromophores. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries, Crossref
Added: July 13, 2020

2018 journal article

Diastereomerically Differentiated Excited State Behavior in Ruthenium(II) Hexafluoroacetylacetonate Complexes of Diphenyl Thioindigo Diimine

Inorganic Chemistry, 57(3), 1386–1397.

By: G. Boice*, S. Garakyaraghi n, B. Patrick*, C. Sanz*, F. Castellano n & R. Hicks*

TL;DR: The series of complexes possess metal-to-ligand charge transfer (MLCT) absorption bands in the near-infrared (λmax 689-783 nm) and do not display photoluminescence in room temperature solution-phase experiments or in experiments at 77 K. (via Semantic Scholar)
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Added: August 6, 2018

2018 journal article

Energy Transfer Dynamics in Triplet–Triplet Annihilation Upconversion Using a Bichromophoric Heavy-Atom-Free Sensitizer

The Journal of Physical Chemistry A, 122(33), 6673–6682.

TL;DR: The ultralong excited state lifetime characteristic of the DBP triplet was shown to be crucial for enhancing the intermolecular TTET efficiency and the subsequent triplet-triplet annihilation photochemistry. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries, Crossref
Added: October 19, 2018

2018 journal article

Enhancing the Visible-Light Absorption and Excited-State Properties of Cu(I) MLCT Excited States

Inorganic Chemistry, 57(4), 2296–2307.

By: S. Garakyaraghi n, C. McCusker n, S. Khan n, P. Koutnik n, A. Bui n & F. Castellano n

TL;DR: This newly conceived molecule appears poised for photosensitization reactions involving energy and electron-transfer processes relevant to photochemical upconversion, photoredox catalysis, and solar fuels photochemistry. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (Web of Science; OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries, Crossref
Added: August 6, 2018

2018 journal article

Nanocrystals for Triplet Sensitization: Molecular Behavior from Quantum-Confined Materials

Inorganic Chemistry, 57(5), 2351–2359.

By: S. Garakyaraghi n & F. Castellano n

TL;DR: A perspective on this emerging field of inorganic quantum dots as photosensitizers, in particular the transfer of triplet excitons at the molecule-nanomaterial interface is provided. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries, Crossref
Added: August 6, 2018

2017 journal article

Charge Localization after Ultrafast Photoexcitation of a Rigid Perylene Perylenediimide Dyad Visualized by Transient Stark Effect

Journal of the American Chemical Society, 139(15), 5530–5537.

TL;DR: The calculations illustrate the complexity of electronic structure in this strongly delocalized superchromophore and reflect the complications in the interpretation of transient absorption results when compared to steady-state approaches such as spectroelectrochemistry and model chromophore experiments such as photoinduced bimolecular charge transfer. (via Semantic Scholar)
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Sources: Web Of Science, ORCID, NC State University Libraries, Crossref
Added: August 6, 2018

2017 journal article

Delayed Molecular Triplet Generation from Energized Lead Sulfide Quantum Dots

The Journal of Physical Chemistry Letters, 8(7), 1458–1463.

By: S. Garakyaraghi n, C. Mongin n, D. Granger*, J. Anthony* & F. Castellano n

TL;DR: This work establishes that small metal chalcogenide semiconductor nanocrystals interfaced with molecular chromophores exhibit behavior reminiscent of supramolecular chemical systems, a potentially impactful concept for nanoscience. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries, Crossref
Added: August 6, 2018

2017 journal article

Photoinduced structural distortions and singlet–triplet intersystem crossing in Cu(i) MLCT excited states monitored by optically gated fluorescence spectroscopy

Physical Chemistry Chemical Physics, 19(25), 16662–16668.

By: S. Garakyaraghi n, P. Koutnik n & F. Castellano n

TL;DR: A comprehensive analysis of the photo-induced structural distortions and singlet-triplet intersystem crossing dynamics of a series of four sterically encumbered Cu(i) phenanthroline chromophores has been conducted, displaying strong wavelength dependence of the singlet emission, with rapid sub-picosecond decay dominating at higher energies. (via Semantic Scholar)
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Sources: Web Of Science, ORCID, NC State University Libraries, Crossref
Added: August 6, 2018

2017 journal article

effect of polymer-fullerene interaction on the dielectric properties of the blend

Advanced Energy Materials, 7(13).

By: I. Constantinou, X. Yi, N. Shewmon, E. Klump, C. Peng, S. Garakyaraghi, C. Lo, J. Reynolds, F. Castellano, F. So

Source: NC State University Libraries
Added: August 6, 2018

2016 journal article

Cuprous Phenanthroline MLCT Chromophore Featuring Synthetically Tailored Photophysics

INORGANIC CHEMISTRY, 55(20), 10628–10636.

By: S. Garakyaraghi n, P. Crapps n, C. McCusker n & F. Castellano n

Contributors: S. Garakyaraghi n, P. Crapps n, C. McCusker n & F. Castellano n

TL;DR: The disparity in the time scales of pseudo-Jahn-Teller distortion and intersystem crossing between two complexes with different anticipated excited-state geometries suggests that strongly impeded structural distortion in the MLCT excited state enables more rapid surface crossings in the initial deactivation dynamics. (via Semantic Scholar)
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Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 journal article

Transient Absorption Dynamics of Sterically Congested Cu(I) MLCT Excited States

JOURNAL OF PHYSICAL CHEMISTRY A, 119(13), 3181–3193.

By: S. Garakyaraghi n, E. Danilov n, C. McCusker n & F. Castellano n

Contributors: S. Garakyaraghi n, E. Danilov n, C. McCusker n & F. Castellano n

TL;DR: The molecule with the most inhibited potential for distortion, [Cu(dsbtmp)2](+), possessed the fastest ultrafast dynamics as well as the longest excited state lifetimes in both solvents, illustrating that strongly impeded structural distortion in Cu(I) MLCT excited state enables more rapid surface crossings in the initial deactivation dynamics. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

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