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Influence of Chromophoric Electron-Donating Groups on Photoinduced Solid-to-Liquid Transitions of Azopolymers

The photoinduced solid-to-liquid transitions property of azobenzene-containing polymers (azopolymers) enables azopolymers with various promising applications. However, a general lack of knowledge regarding the influence of structure of the azobenzene derivatives on the photoinduced liquefaction hind...

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Autores principales: Xu, Jian, Niu, Bin, Guo, Song, Zhao, Xiaolei, Li, Xiaoli, Peng, Jinwen, Deng, Weixing, Wu, Si, Liu, Yuanli
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7240690/
https://www.ncbi.nlm.nih.gov/pubmed/32294996
http://dx.doi.org/10.3390/polym12040901
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author Xu, Jian
Niu, Bin
Guo, Song
Zhao, Xiaolei
Li, Xiaoli
Peng, Jinwen
Deng, Weixing
Wu, Si
Liu, Yuanli
author_facet Xu, Jian
Niu, Bin
Guo, Song
Zhao, Xiaolei
Li, Xiaoli
Peng, Jinwen
Deng, Weixing
Wu, Si
Liu, Yuanli
author_sort Xu, Jian
collection PubMed
description The photoinduced solid-to-liquid transitions property of azobenzene-containing polymers (azopolymers) enables azopolymers with various promising applications. However, a general lack of knowledge regarding the influence of structure of the azobenzene derivatives on the photoinduced liquefaction hinders the design of novel azopolymers. In the present study, a series of azopolymers with side chains containing azobenzene unit bearing alkyl electron-donating groups were synthesized. The photoisomerization and photoinduced liquefaction properties of newly synthesized azopolymers were investigated. Alkyl-based electron-donating group significantly facilitate the photoisomerization process of azopolymers in solution, as the electron-donating ability of substituents increased, the time required for photoisomerization of azopolymers continually deceased. Meanwhile, the electron-donating group can drastically accelerate photoinduced solid-to-liquid transitions of azopolymers, the liquefaction rate of obtained azopolymers gradually getting quicker as the electron-donating ability of substituents increased. This study clearly demonstrates that the electron-donating group that bearing in the azobenzene group of polymer side chain play an essential role on the photoinduced solid-to-liquid transitions of azopolymers, and hence, gives an insight into how to design novel azopolymers for practical applications.
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spelling pubmed-72406902020-06-11 Influence of Chromophoric Electron-Donating Groups on Photoinduced Solid-to-Liquid Transitions of Azopolymers Xu, Jian Niu, Bin Guo, Song Zhao, Xiaolei Li, Xiaoli Peng, Jinwen Deng, Weixing Wu, Si Liu, Yuanli Polymers (Basel) Article The photoinduced solid-to-liquid transitions property of azobenzene-containing polymers (azopolymers) enables azopolymers with various promising applications. However, a general lack of knowledge regarding the influence of structure of the azobenzene derivatives on the photoinduced liquefaction hinders the design of novel azopolymers. In the present study, a series of azopolymers with side chains containing azobenzene unit bearing alkyl electron-donating groups were synthesized. The photoisomerization and photoinduced liquefaction properties of newly synthesized azopolymers were investigated. Alkyl-based electron-donating group significantly facilitate the photoisomerization process of azopolymers in solution, as the electron-donating ability of substituents increased, the time required for photoisomerization of azopolymers continually deceased. Meanwhile, the electron-donating group can drastically accelerate photoinduced solid-to-liquid transitions of azopolymers, the liquefaction rate of obtained azopolymers gradually getting quicker as the electron-donating ability of substituents increased. This study clearly demonstrates that the electron-donating group that bearing in the azobenzene group of polymer side chain play an essential role on the photoinduced solid-to-liquid transitions of azopolymers, and hence, gives an insight into how to design novel azopolymers for practical applications. MDPI 2020-04-13 /pmc/articles/PMC7240690/ /pubmed/32294996 http://dx.doi.org/10.3390/polym12040901 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xu, Jian
Niu, Bin
Guo, Song
Zhao, Xiaolei
Li, Xiaoli
Peng, Jinwen
Deng, Weixing
Wu, Si
Liu, Yuanli
Influence of Chromophoric Electron-Donating Groups on Photoinduced Solid-to-Liquid Transitions of Azopolymers
title Influence of Chromophoric Electron-Donating Groups on Photoinduced Solid-to-Liquid Transitions of Azopolymers
title_full Influence of Chromophoric Electron-Donating Groups on Photoinduced Solid-to-Liquid Transitions of Azopolymers
title_fullStr Influence of Chromophoric Electron-Donating Groups on Photoinduced Solid-to-Liquid Transitions of Azopolymers
title_full_unstemmed Influence of Chromophoric Electron-Donating Groups on Photoinduced Solid-to-Liquid Transitions of Azopolymers
title_short Influence of Chromophoric Electron-Donating Groups on Photoinduced Solid-to-Liquid Transitions of Azopolymers
title_sort influence of chromophoric electron-donating groups on photoinduced solid-to-liquid transitions of azopolymers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7240690/
https://www.ncbi.nlm.nih.gov/pubmed/32294996
http://dx.doi.org/10.3390/polym12040901
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