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A Simple Molecular Design Strategy for Delayed Fluorescence toward 1000 nm

[Image: see text] Harnessing the near-infrared (NIR) region of the electromagnetic spectrum is exceedingly important for photovoltaics, telecommunications, and the biomedical sciences. While thermally activated delayed fluorescent (TADF) materials have attracted much interest due to their intense lu...

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Autores principales: Congrave, Daniel G., Drummond, Bluebell H., Conaghan, Patrick J., Francis, Haydn, Jones, Saul T. E., Grey, Clare P., Greenham, Neil C., Credgington, Dan, Bronstein, Hugo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6890363/
https://www.ncbi.nlm.nih.gov/pubmed/31661267
http://dx.doi.org/10.1021/jacs.9b09323
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author Congrave, Daniel G.
Drummond, Bluebell H.
Conaghan, Patrick J.
Francis, Haydn
Jones, Saul T. E.
Grey, Clare P.
Greenham, Neil C.
Credgington, Dan
Bronstein, Hugo
author_facet Congrave, Daniel G.
Drummond, Bluebell H.
Conaghan, Patrick J.
Francis, Haydn
Jones, Saul T. E.
Grey, Clare P.
Greenham, Neil C.
Credgington, Dan
Bronstein, Hugo
author_sort Congrave, Daniel G.
collection PubMed
description [Image: see text] Harnessing the near-infrared (NIR) region of the electromagnetic spectrum is exceedingly important for photovoltaics, telecommunications, and the biomedical sciences. While thermally activated delayed fluorescent (TADF) materials have attracted much interest due to their intense luminescence and narrow exchange energies (ΔE(ST)), they are still greatly inferior to conventional fluorescent dyes in the NIR, which precludes their application. This is because securing a sufficiently strong donor–acceptor (D–A) interaction for NIR emission alongside the narrow ΔE(ST) required for TADF is highly challenging. Here, we demonstrate that by abandoning the common polydonor model in favor of a D–A dyad structure, a sufficiently strong D–A interaction can be obtained to realize a TADF emitter capable of photoluminescence (PL) close to 1000 nm. Electroluminescence (EL) at a peak wavelength of 904 nm is also reported. This strategy is both conceptually and synthetically simple and offers a new approach to the development of future NIR TADF materials.
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spelling pubmed-68903632019-12-05 A Simple Molecular Design Strategy for Delayed Fluorescence toward 1000 nm Congrave, Daniel G. Drummond, Bluebell H. Conaghan, Patrick J. Francis, Haydn Jones, Saul T. E. Grey, Clare P. Greenham, Neil C. Credgington, Dan Bronstein, Hugo J Am Chem Soc [Image: see text] Harnessing the near-infrared (NIR) region of the electromagnetic spectrum is exceedingly important for photovoltaics, telecommunications, and the biomedical sciences. While thermally activated delayed fluorescent (TADF) materials have attracted much interest due to their intense luminescence and narrow exchange energies (ΔE(ST)), they are still greatly inferior to conventional fluorescent dyes in the NIR, which precludes their application. This is because securing a sufficiently strong donor–acceptor (D–A) interaction for NIR emission alongside the narrow ΔE(ST) required for TADF is highly challenging. Here, we demonstrate that by abandoning the common polydonor model in favor of a D–A dyad structure, a sufficiently strong D–A interaction can be obtained to realize a TADF emitter capable of photoluminescence (PL) close to 1000 nm. Electroluminescence (EL) at a peak wavelength of 904 nm is also reported. This strategy is both conceptually and synthetically simple and offers a new approach to the development of future NIR TADF materials. American Chemical Society 2019-10-29 2019-11-20 /pmc/articles/PMC6890363/ /pubmed/31661267 http://dx.doi.org/10.1021/jacs.9b09323 Text en Copyright © 2019 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
spellingShingle Congrave, Daniel G.
Drummond, Bluebell H.
Conaghan, Patrick J.
Francis, Haydn
Jones, Saul T. E.
Grey, Clare P.
Greenham, Neil C.
Credgington, Dan
Bronstein, Hugo
A Simple Molecular Design Strategy for Delayed Fluorescence toward 1000 nm
title A Simple Molecular Design Strategy for Delayed Fluorescence toward 1000 nm
title_full A Simple Molecular Design Strategy for Delayed Fluorescence toward 1000 nm
title_fullStr A Simple Molecular Design Strategy for Delayed Fluorescence toward 1000 nm
title_full_unstemmed A Simple Molecular Design Strategy for Delayed Fluorescence toward 1000 nm
title_short A Simple Molecular Design Strategy for Delayed Fluorescence toward 1000 nm
title_sort simple molecular design strategy for delayed fluorescence toward 1000 nm
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6890363/
https://www.ncbi.nlm.nih.gov/pubmed/31661267
http://dx.doi.org/10.1021/jacs.9b09323
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