手性光開關(guān)構(gòu)筑液晶螺旋結(jié)構(gòu)研究進(jìn)展

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中圖分類號(hào)： O753+ .2 文獻(xiàn)標(biāo)識(shí)碼：A doi：10.37188/CJLCD.2024-0257 CSTR：32172.14.CJLCD.2024-0257

Progress on chiral photoswitches for constructing liquid crystal helical structures

HU Honglong，ZHENG Zhigang

（School of Physics，East China University ofScience and Technology，Shanghai 2Oo237，China）

Abstract： Photoresponsive chiral liquid crystal materials，as a type of soft matter with self-assembly and entropy-driven ordering properties，exhibit excellent optical modulation of helical structures and are widely used in optical anti-counterfeiting，optical coding，and laser engineering.By incorporating chiral photoswitches into liquid crystal systems，light-induced chiral conversion can be effectively harnessed to remotely control the self-assembled helical structures of the liquid crystal materials. Currently，azobenzene，molecular motors，and diarylethene are widely utilized as chiral photoswitches in liquid crystal systems. These compounds exhibit weak stimulus and strong response control properties，highlighting their broad application prospects.This paper focuses on the structural design concepts of these three types of chiral photoswitches and summarizes the unique properties exhibited in light-modulated liquid crystal helical structures，including the reversible optical control of parameters such as helical structure pitch size and direction. Finally，the light-responsive flexible liquid crystal materials constructed using these photoswitches demonstrated their ability to achieve changes in color and shape through light manipulation，showcasing potential application in information storage，anti-counterfeiting，soft robotics，and wearable devices，along with an outlook on future developments in this field.

Keywords：photoswitches；chirality；liquid crystals；helical structures

1引言

法國諾貝爾獎(jiǎng)獲得者P.G.deGennes在1991年諾貝爾物理學(xué)獎(jiǎng)首次提出軟物質(zhì)概念。（剩余33304字）