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meta-Terphenyl linked donor–π–acceptor dyads: intramolecular charge transfer controlled by electron acceptor group tuning

A series of meta-terphenyl linked donor–π–acceptor (D–π–A) dyads were prepared to understand the electronic effects of a meta-terphenyl linker according to the electron-accepting ability change. The energy band gaps of the dyads were controlled by tuning the accepting ability, which resulted in emis...

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Autores principales: Kim, Min-Ji, Ahn, Mina, Chae, Minjung, Kim, Sanghyun, Kim, Daehoon, Wee, Kyung-Ryang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9042948/
https://www.ncbi.nlm.nih.gov/pubmed/35494739
http://dx.doi.org/10.1039/d1ra06602a
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author Kim, Min-Ji
Ahn, Mina
Chae, Minjung
Kim, Sanghyun
Kim, Daehoon
Wee, Kyung-Ryang
author_facet Kim, Min-Ji
Ahn, Mina
Chae, Minjung
Kim, Sanghyun
Kim, Daehoon
Wee, Kyung-Ryang
author_sort Kim, Min-Ji
collection PubMed
description A series of meta-terphenyl linked donor–π–acceptor (D–π–A) dyads were prepared to understand the electronic effects of a meta-terphenyl linker according to the electron-accepting ability change. The energy band gaps of the dyads were controlled by tuning the accepting ability, which resulted in emission colors ranging from blue-green to red. In the Lippert–Mataga plots, intramolecular charge transfer (ICT) behavior was observed, which showed gradually increased ICT characteristics as the accepting ability was increased. On the other hand, in the absorption spectra, a red shift of the ICT transition was observed differently from the electron-accepting ability tendency. Thus, the experimental results show that the ICT is determined by steric hindrance rather than the acceptor ability in the ground state due to the lack of π-conjugation of the terphenyl linker by the electron node in the meta-position, whereas ICT in the excited state is controlled by electron-accepting ability.
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spelling pubmed-90429482022-04-28 meta-Terphenyl linked donor–π–acceptor dyads: intramolecular charge transfer controlled by electron acceptor group tuning Kim, Min-Ji Ahn, Mina Chae, Minjung Kim, Sanghyun Kim, Daehoon Wee, Kyung-Ryang RSC Adv Chemistry A series of meta-terphenyl linked donor–π–acceptor (D–π–A) dyads were prepared to understand the electronic effects of a meta-terphenyl linker according to the electron-accepting ability change. The energy band gaps of the dyads were controlled by tuning the accepting ability, which resulted in emission colors ranging from blue-green to red. In the Lippert–Mataga plots, intramolecular charge transfer (ICT) behavior was observed, which showed gradually increased ICT characteristics as the accepting ability was increased. On the other hand, in the absorption spectra, a red shift of the ICT transition was observed differently from the electron-accepting ability tendency. Thus, the experimental results show that the ICT is determined by steric hindrance rather than the acceptor ability in the ground state due to the lack of π-conjugation of the terphenyl linker by the electron node in the meta-position, whereas ICT in the excited state is controlled by electron-accepting ability. The Royal Society of Chemistry 2021-10-28 /pmc/articles/PMC9042948/ /pubmed/35494739 http://dx.doi.org/10.1039/d1ra06602a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Kim, Min-Ji
Ahn, Mina
Chae, Minjung
Kim, Sanghyun
Kim, Daehoon
Wee, Kyung-Ryang
meta-Terphenyl linked donor–π–acceptor dyads: intramolecular charge transfer controlled by electron acceptor group tuning
title meta-Terphenyl linked donor–π–acceptor dyads: intramolecular charge transfer controlled by electron acceptor group tuning
title_full meta-Terphenyl linked donor–π–acceptor dyads: intramolecular charge transfer controlled by electron acceptor group tuning
title_fullStr meta-Terphenyl linked donor–π–acceptor dyads: intramolecular charge transfer controlled by electron acceptor group tuning
title_full_unstemmed meta-Terphenyl linked donor–π–acceptor dyads: intramolecular charge transfer controlled by electron acceptor group tuning
title_short meta-Terphenyl linked donor–π–acceptor dyads: intramolecular charge transfer controlled by electron acceptor group tuning
title_sort meta-terphenyl linked donor–π–acceptor dyads: intramolecular charge transfer controlled by electron acceptor group tuning
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9042948/
https://www.ncbi.nlm.nih.gov/pubmed/35494739
http://dx.doi.org/10.1039/d1ra06602a
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