Single photon triggered dianion formation in TCNQ and F(4)TCNQ crystals

Excited state dynamics in two strong organic electron acceptor systems, TCNQ and F(4)TCNQ single crystals, was studied. After absorption of a single photon, dianions are formed in both crystals on ultrashort timescale: TCNQ τ < 50 fs, F(4)TCNQ τ = 4 ps. By use of transient absorption spectroscopy...

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Autores principales: Ma, Lin, Hu, Peng, Jiang, Hui, Kloc, Christian, Sun, Handong, Soci, Cesare, Voityuk, Alexander A., Michel-Beyerle, Maria E., Gurzadyan, Gagik G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4921923/
https://www.ncbi.nlm.nih.gov/pubmed/27346797
http://dx.doi.org/10.1038/srep28510
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author Ma, Lin
Hu, Peng
Jiang, Hui
Kloc, Christian
Sun, Handong
Soci, Cesare
Voityuk, Alexander A.
Michel-Beyerle, Maria E.
Gurzadyan, Gagik G.
author_facet Ma, Lin
Hu, Peng
Jiang, Hui
Kloc, Christian
Sun, Handong
Soci, Cesare
Voityuk, Alexander A.
Michel-Beyerle, Maria E.
Gurzadyan, Gagik G.
author_sort Ma, Lin
collection PubMed
description Excited state dynamics in two strong organic electron acceptor systems, TCNQ and F(4)TCNQ single crystals, was studied. After absorption of a single photon, dianions are formed in both crystals on ultrashort timescale: TCNQ τ < 50 fs, F(4)TCNQ τ = 4 ps. By use of transient absorption spectroscopy, we demonstrate that the dianion formation in F(4)TCNQ is mediated by the radical anion precursor which is described by a two-step model. Our measurements show the phenomenon that in this quinoid acceptor crystals in the absence of additional donor molecule, it is possible to resolve the two step formation of a doubly charged anion upon absorption of a single low energy photon (2.6 eV).
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spelling pubmed-49219232016-06-28 Single photon triggered dianion formation in TCNQ and F(4)TCNQ crystals Ma, Lin Hu, Peng Jiang, Hui Kloc, Christian Sun, Handong Soci, Cesare Voityuk, Alexander A. Michel-Beyerle, Maria E. Gurzadyan, Gagik G. Sci Rep Article Excited state dynamics in two strong organic electron acceptor systems, TCNQ and F(4)TCNQ single crystals, was studied. After absorption of a single photon, dianions are formed in both crystals on ultrashort timescale: TCNQ τ < 50 fs, F(4)TCNQ τ = 4 ps. By use of transient absorption spectroscopy, we demonstrate that the dianion formation in F(4)TCNQ is mediated by the radical anion precursor which is described by a two-step model. Our measurements show the phenomenon that in this quinoid acceptor crystals in the absence of additional donor molecule, it is possible to resolve the two step formation of a doubly charged anion upon absorption of a single low energy photon (2.6 eV). Nature Publishing Group 2016-06-27 /pmc/articles/PMC4921923/ /pubmed/27346797 http://dx.doi.org/10.1038/srep28510 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Ma, Lin
Hu, Peng
Jiang, Hui
Kloc, Christian
Sun, Handong
Soci, Cesare
Voityuk, Alexander A.
Michel-Beyerle, Maria E.
Gurzadyan, Gagik G.
Single photon triggered dianion formation in TCNQ and F(4)TCNQ crystals
title Single photon triggered dianion formation in TCNQ and F(4)TCNQ crystals
title_full Single photon triggered dianion formation in TCNQ and F(4)TCNQ crystals
title_fullStr Single photon triggered dianion formation in TCNQ and F(4)TCNQ crystals
title_full_unstemmed Single photon triggered dianion formation in TCNQ and F(4)TCNQ crystals
title_short Single photon triggered dianion formation in TCNQ and F(4)TCNQ crystals
title_sort single photon triggered dianion formation in tcnq and f(4)tcnq crystals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4921923/
https://www.ncbi.nlm.nih.gov/pubmed/27346797
http://dx.doi.org/10.1038/srep28510
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