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Thermochromic aggregation-induced dual phosphorescence via temperature-dependent sp(3)-linked donor-acceptor electronic coupling

Aggregation-induced emission (AIE) has proven to be a viable strategy to achieve highly efficient room temperature phosphorescence (RTP) in bulk by restricting molecular motions. Here, we show that by utilizing triphenylamine (TPA) as an electronic donor that connects to an acceptor via an sp(3) lin...

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Autores principales: Wang, Tao, Hu, Zhubin, Nie, Xiancheng, Huang, Linkun, Hui, Miao, Sun, Xiang, Zhang, Guoqing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7921125/
https://www.ncbi.nlm.nih.gov/pubmed/33649318
http://dx.doi.org/10.1038/s41467-021-21676-5
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author Wang, Tao
Hu, Zhubin
Nie, Xiancheng
Huang, Linkun
Hui, Miao
Sun, Xiang
Zhang, Guoqing
author_facet Wang, Tao
Hu, Zhubin
Nie, Xiancheng
Huang, Linkun
Hui, Miao
Sun, Xiang
Zhang, Guoqing
author_sort Wang, Tao
collection PubMed
description Aggregation-induced emission (AIE) has proven to be a viable strategy to achieve highly efficient room temperature phosphorescence (RTP) in bulk by restricting molecular motions. Here, we show that by utilizing triphenylamine (TPA) as an electronic donor that connects to an acceptor via an sp(3) linker, six TPA-based AIE-active RTP luminophores were obtained. Distinct dual phosphorescence bands emitting from largely localized donor and acceptor triplet emitting states could be recorded at lowered temperatures; at room temperature, only a merged RTP band is present. Theoretical investigations reveal that the two temperature-dependent phosphorescence bands both originate from local/global minima from the lowest triplet excited state (T(1)). The reported molecular construct serves as an intermediary case between a fully conjugated donor-acceptor system and a donor/acceptor binary mix, which may provide important clues on the design and control of high-freedom molecular systems with complex excited-state dynamics.
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spelling pubmed-79211252021-03-12 Thermochromic aggregation-induced dual phosphorescence via temperature-dependent sp(3)-linked donor-acceptor electronic coupling Wang, Tao Hu, Zhubin Nie, Xiancheng Huang, Linkun Hui, Miao Sun, Xiang Zhang, Guoqing Nat Commun Article Aggregation-induced emission (AIE) has proven to be a viable strategy to achieve highly efficient room temperature phosphorescence (RTP) in bulk by restricting molecular motions. Here, we show that by utilizing triphenylamine (TPA) as an electronic donor that connects to an acceptor via an sp(3) linker, six TPA-based AIE-active RTP luminophores were obtained. Distinct dual phosphorescence bands emitting from largely localized donor and acceptor triplet emitting states could be recorded at lowered temperatures; at room temperature, only a merged RTP band is present. Theoretical investigations reveal that the two temperature-dependent phosphorescence bands both originate from local/global minima from the lowest triplet excited state (T(1)). The reported molecular construct serves as an intermediary case between a fully conjugated donor-acceptor system and a donor/acceptor binary mix, which may provide important clues on the design and control of high-freedom molecular systems with complex excited-state dynamics. Nature Publishing Group UK 2021-03-01 /pmc/articles/PMC7921125/ /pubmed/33649318 http://dx.doi.org/10.1038/s41467-021-21676-5 Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Wang, Tao
Hu, Zhubin
Nie, Xiancheng
Huang, Linkun
Hui, Miao
Sun, Xiang
Zhang, Guoqing
Thermochromic aggregation-induced dual phosphorescence via temperature-dependent sp(3)-linked donor-acceptor electronic coupling
title Thermochromic aggregation-induced dual phosphorescence via temperature-dependent sp(3)-linked donor-acceptor electronic coupling
title_full Thermochromic aggregation-induced dual phosphorescence via temperature-dependent sp(3)-linked donor-acceptor electronic coupling
title_fullStr Thermochromic aggregation-induced dual phosphorescence via temperature-dependent sp(3)-linked donor-acceptor electronic coupling
title_full_unstemmed Thermochromic aggregation-induced dual phosphorescence via temperature-dependent sp(3)-linked donor-acceptor electronic coupling
title_short Thermochromic aggregation-induced dual phosphorescence via temperature-dependent sp(3)-linked donor-acceptor electronic coupling
title_sort thermochromic aggregation-induced dual phosphorescence via temperature-dependent sp(3)-linked donor-acceptor electronic coupling
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7921125/
https://www.ncbi.nlm.nih.gov/pubmed/33649318
http://dx.doi.org/10.1038/s41467-021-21676-5
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