Vapour-Induced Liquid Crystallinity and Self-Recovery Mechanochromism of Helical Block Copolymer

Abstract New molecular design of conjugated polymer that possess high sensitivity to vapour and self-recovering property against pressure is proposed. We synthesised a rod-rod diblock copolymer, poly(3-((3S)-3,7-dimethyl-octyl)-thiophene)-block-poly(4-octyl phenylisocyanide) (PTh- b -PPI), composed...

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Autores principales:	Hiroki Hayashi, Tomokazu Iseki, Shigeki Nimori, Hiromasa Goto
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d76604b7b6504e97928e522c93c6c461
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spelling	oai:doaj.org-article:d76604b7b6504e97928e522c93c6c4612021-12-02T11:41:09ZVapour-Induced Liquid Crystallinity and Self-Recovery Mechanochromism of Helical Block Copolymer10.1038/s41598-017-03948-72045-2322https://doaj.org/article/d76604b7b6504e97928e522c93c6c4612017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03948-7https://doaj.org/toc/2045-2322Abstract New molecular design of conjugated polymer that possess high sensitivity to vapour and self-recovering property against pressure is proposed. We synthesised a rod-rod diblock copolymer, poly(3-((3S)-3,7-dimethyl-octyl)-thiophene)-block-poly(4-octyl phenylisocyanide) (PTh- b -PPI), composed of a π-conjugated polymer and a rod-type helical coiled polymer. Introduction of PPI block in the block copolymer architecture enabled PTh- b -PPI film to exhibit solid-to-liquid crystal phase transition by exposure to chloroform vapour, accompanied with colour change (purple-to-yellow), which is the first report on a new phenomenon of “vapour-induced liquid crystallinity”. In addition, PTh- b -PPI film showed colour change (purple-to-vermillion) during mechanical shearing, and spontaneously recovered under ambient conditions. We concluded that rod-type helical coiled polymer PPI block performs crucial roles as intrinsically vapour-induced liquid crystallinity and self-reassembling property in the architecture of PTh- b -PPI.Hiroki HayashiTomokazu IsekiShigeki NimoriHiromasa GotoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hiroki Hayashi Tomokazu Iseki Shigeki Nimori Hiromasa Goto Vapour-Induced Liquid Crystallinity and Self-Recovery Mechanochromism of Helical Block Copolymer
description	Abstract New molecular design of conjugated polymer that possess high sensitivity to vapour and self-recovering property against pressure is proposed. We synthesised a rod-rod diblock copolymer, poly(3-((3S)-3,7-dimethyl-octyl)-thiophene)-block-poly(4-octyl phenylisocyanide) (PTh- b -PPI), composed of a π-conjugated polymer and a rod-type helical coiled polymer. Introduction of PPI block in the block copolymer architecture enabled PTh- b -PPI film to exhibit solid-to-liquid crystal phase transition by exposure to chloroform vapour, accompanied with colour change (purple-to-yellow), which is the first report on a new phenomenon of “vapour-induced liquid crystallinity”. In addition, PTh- b -PPI film showed colour change (purple-to-vermillion) during mechanical shearing, and spontaneously recovered under ambient conditions. We concluded that rod-type helical coiled polymer PPI block performs crucial roles as intrinsically vapour-induced liquid crystallinity and self-reassembling property in the architecture of PTh- b -PPI.
format	article
author	Hiroki Hayashi Tomokazu Iseki Shigeki Nimori Hiromasa Goto
author_facet	Hiroki Hayashi Tomokazu Iseki Shigeki Nimori Hiromasa Goto
author_sort	Hiroki Hayashi
title	Vapour-Induced Liquid Crystallinity and Self-Recovery Mechanochromism of Helical Block Copolymer
title_short	Vapour-Induced Liquid Crystallinity and Self-Recovery Mechanochromism of Helical Block Copolymer
title_full	Vapour-Induced Liquid Crystallinity and Self-Recovery Mechanochromism of Helical Block Copolymer
title_fullStr	Vapour-Induced Liquid Crystallinity and Self-Recovery Mechanochromism of Helical Block Copolymer
title_full_unstemmed	Vapour-Induced Liquid Crystallinity and Self-Recovery Mechanochromism of Helical Block Copolymer
title_sort	vapour-induced liquid crystallinity and self-recovery mechanochromism of helical block copolymer
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/d76604b7b6504e97928e522c93c6c461
work_keys_str_mv	AT hirokihayashi vapourinducedliquidcrystallinityandselfrecoverymechanochromismofhelicalblockcopolymer AT tomokazuiseki vapourinducedliquidcrystallinityandselfrecoverymechanochromismofhelicalblockcopolymer AT shigekinimori vapourinducedliquidcrystallinityandselfrecoverymechanochromismofhelicalblockcopolymer AT hiromasagoto vapourinducedliquidcrystallinityandselfrecoverymechanochromismofhelicalblockcopolymer
_version_	1718395488329269248

Vapour-Induced Liquid Crystallinity and Self-Recovery Mechanochromism of Helical Block Copolymer

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