A New Chirality Invertible Photoswitch:Light-Driven Axially Chiral Hydrazone Enabling Dynamic Handedness Inversion of Self-Organized Helical Superstructure  

作　　者：Ruochen Lan Jinying Bao Zhaozhong Li Zizheng Wang Zichen Wang Qian Wang Lanying Zhang Jiumei Xiao Huai Yang 

机构地区：[1]Institute of Advanced Materials,College of Chemistry and Chemical Engineering,Jiangxi Normal University,Nanchang 330022 [2]Beijing Advanced Innovation Center for Materials Genome Engineering,School of Materials Science and Engineering,Peking University,Beijing 100871 [3]School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083 [4]Beijing Advanced Innovation Center for Materials Genome Engineering,Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083 [5]Key Laboratory of Polymer Chemistry and Physics of Ministry of Education,Peking University,Beijing 100871 [6]School of Mathematics and Physics,University of Science and Technology Beijing,Beijing 100083

出　　处：《CCS Chemistry》2024年第8期2011-2020,共10页中国化学会会刊（英文）

基　　金：supported by the National Natural Science Foundation of China(grant nos.52202081,52073028,52073081,and 51720105002);the Natural Science Foundation of Jiangxi Province,China(grant no.20232BAB204030).

摘　　要：Inspired by nature,dynamic self-organized helical superstructures are becoming attractive as building blocks in soft photonic crystals and advanced chiroptical devices.Herein,a chirality invertible hydrazone photoswitch,possessing high helical twisting power(HTP)was judiciously designed and synthesized.Due to the photoinduced configuration changes of the hydrazone photoswitch,it displayed superior thermal stability and strikingly reversible HTP changes.By incorporating a novel chiral hydrazone(CH)into the liquid crystal(LC)host,a handedness invertible cholesteric liquid crystal(CLC)helical superstructure with high thermal stability and light-modulated photonic bandgap was prepared.We inferred that the mechanism of chirality inversion of the novel CH photoswitch derived from changes in the dihedral angle between the two naphthalene rings induced by hydrazone isomerization.Therefore,the influence of chemical structures on its photoresponsiveness was explored.Finally,the potential applications of this advanced light-driven CLC in soft photonic crystals,showing erasable and rewritable colorful patterns and chiroptical templates to induce handedness invertible circularly polarized luminescence were illustrated.

关 键 词：chirality inversion hydrazone photoswitch cholesteric liquid crystals dynamic photonic crystals dynamic circularly polarized luminescence 

分 类 号：O62[理学—有机化学]