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Two-photon-excited ultralong organic room temperature phosphorescence by dual-channel triplet harvesting

Due to inefficient molecular design strategies, two-photon-excited ultralong organic room temperature phosphorescence (TPUOP) has not yet been reported in single-component materials. Herein, we present an innovative design method by dual-channel triplet harvesting to obtain the first bright TPUOP mo...

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Autores principales: Mao, Zhu, Yang, Zhan, Xu, Chao, Xie, Zongliang, Jiang, Long, Gu, Feng Long, Zhao, Juan, Zhang, Yi, Aldred, Matthew P., Chi, Zhenguo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6713867/
https://www.ncbi.nlm.nih.gov/pubmed/31489156
http://dx.doi.org/10.1039/c9sc02282a
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author Mao, Zhu
Yang, Zhan
Xu, Chao
Xie, Zongliang
Jiang, Long
Gu, Feng Long
Zhao, Juan
Zhang, Yi
Aldred, Matthew P.
Chi, Zhenguo
author_facet Mao, Zhu
Yang, Zhan
Xu, Chao
Xie, Zongliang
Jiang, Long
Gu, Feng Long
Zhao, Juan
Zhang, Yi
Aldred, Matthew P.
Chi, Zhenguo
author_sort Mao, Zhu
collection PubMed
description Due to inefficient molecular design strategies, two-photon-excited ultralong organic room temperature phosphorescence (TPUOP) has not yet been reported in single-component materials. Herein, we present an innovative design method by dual-channel triplet harvesting to obtain the first bright TPUOP molecule with a lifetime of 0.84 s and a quantum efficiency of 16.6%. In compound o-Cz the donor and acceptor units are connected at the ortho position of benzophenone, showing intramolecular space charge transfer. Therefore, the two-photon absorption ability is improved due to the enhanced charge transfer character. Moreover, the small energy gap boosts dual-channel triplet harvesting via ultralong thermally activated delayed fluorescence and H-aggregation phosphorescence, which suppresses the long-lived triplet concentration quenching. Through two-photon absorption, a near-infrared laser (808 nm) is able to trigger the obvious ultralong emission under ambient conditions. This research work provides valuable guidance for designing near-infrared-excited ultralong organic room temperature phosphorescence materials.
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spelling pubmed-67138672019-09-05 Two-photon-excited ultralong organic room temperature phosphorescence by dual-channel triplet harvesting Mao, Zhu Yang, Zhan Xu, Chao Xie, Zongliang Jiang, Long Gu, Feng Long Zhao, Juan Zhang, Yi Aldred, Matthew P. Chi, Zhenguo Chem Sci Chemistry Due to inefficient molecular design strategies, two-photon-excited ultralong organic room temperature phosphorescence (TPUOP) has not yet been reported in single-component materials. Herein, we present an innovative design method by dual-channel triplet harvesting to obtain the first bright TPUOP molecule with a lifetime of 0.84 s and a quantum efficiency of 16.6%. In compound o-Cz the donor and acceptor units are connected at the ortho position of benzophenone, showing intramolecular space charge transfer. Therefore, the two-photon absorption ability is improved due to the enhanced charge transfer character. Moreover, the small energy gap boosts dual-channel triplet harvesting via ultralong thermally activated delayed fluorescence and H-aggregation phosphorescence, which suppresses the long-lived triplet concentration quenching. Through two-photon absorption, a near-infrared laser (808 nm) is able to trigger the obvious ultralong emission under ambient conditions. This research work provides valuable guidance for designing near-infrared-excited ultralong organic room temperature phosphorescence materials. Royal Society of Chemistry 2019-06-24 /pmc/articles/PMC6713867/ /pubmed/31489156 http://dx.doi.org/10.1039/c9sc02282a Text en This journal is © The Royal Society of Chemistry 2019 http://creativecommons.org/licenses/by-nc/3.0/ This article is freely available. This article is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported Licence (CC BY-NC 3.0)
spellingShingle Chemistry
Mao, Zhu
Yang, Zhan
Xu, Chao
Xie, Zongliang
Jiang, Long
Gu, Feng Long
Zhao, Juan
Zhang, Yi
Aldred, Matthew P.
Chi, Zhenguo
Two-photon-excited ultralong organic room temperature phosphorescence by dual-channel triplet harvesting
title Two-photon-excited ultralong organic room temperature phosphorescence by dual-channel triplet harvesting
title_full Two-photon-excited ultralong organic room temperature phosphorescence by dual-channel triplet harvesting
title_fullStr Two-photon-excited ultralong organic room temperature phosphorescence by dual-channel triplet harvesting
title_full_unstemmed Two-photon-excited ultralong organic room temperature phosphorescence by dual-channel triplet harvesting
title_short Two-photon-excited ultralong organic room temperature phosphorescence by dual-channel triplet harvesting
title_sort two-photon-excited ultralong organic room temperature phosphorescence by dual-channel triplet harvesting
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6713867/
https://www.ncbi.nlm.nih.gov/pubmed/31489156
http://dx.doi.org/10.1039/c9sc02282a
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