Photoswitchable Molecular Recognition Enabled by Dithienylethene-Mediated Structural Changes of Dynamic Covalent Hydrazone Bonds  

作　　者：Lifeng Wang Hanxun Zou Hebo Ye Yu Hai Hanwei Lu Junmiao Deng Lei You 

机构地区：[1]State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002 [2]College of Chemistry and Material Science,Fujian Normal University,Fuzhou 350007 [3]University of Chinese Academy of Sciences,Beijing 100049 [4]Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108

出　　处：《CCS Chemistry》2024年第2期497-506,共10页中国化学会会刊（英文）

基　　金：supported by National Natural Science Foundation of China(grant nos.22071247,92156010,22101283,and 22101284);the Strategic Priority Research Program(grant no.XDB20000000);the Key Research Program of Frontier Sciences(grant no.QYZDBSSW-SLH030)of the Chinese Academy of Sciences,Natural Science Foundation of Fujian Province(grant nos.2020J06035 and 2022J05085);Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(grant no.2021ZR112).

摘　　要：Light-induced recognition,assemblies,and materials are intensive areas of research due to their high spatiotemporal resolution.Herein,we demonstrated photoswitchable molecular recognition via dithienylethene-triggeredreversible structural regulation of dynamic covalent hydrazone bonds.By combining dithienylethenes and cyclic hemiacetals,the photochemical open-ring and closed-ring forms enabled turningoff and on the creation of awide range of hydrazones when desired.Light-induced bidirectional switching between hydrazones and their cyclization structures promoted by a neighboring carboxyl group was further achieved.By taking advantage of reversible structural changes totoggleon andoff the binding pocket,photoswitchable recognitionofmetal ionswas realized.Finally,the construction of an acylhydrazone polymer offered a facile way for light-mediated selective extraction/release.The strategies and results reported here should find applications in many contexts,such asdynamicassemblies,molecular switches,and smart materials.

关 键 词：molecular recognition PHOTOSWITCH dynamic covalent chemistry hydrazone selective extraction/release 

分 类 号：O62[理学—有机化学]