Construction and investigation of photo-switch property of azobenzene-bridged pillar[5]arene-based[3]rotaxanes  

作　　者：Hui Chong Cuiyun Nie Lihong Wang Sicong Wang Ying Han Yang Wang Chengyin Wang Chaoguo Yan 

机构地区：[1]College of Chemistry&Chemical Engineering,Yangzhou University,Yangzhou 225002,China

出　　处：《Chinese Chemical Letters》2021年第1期57-61,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21372192,21871227);the Natural Science Foundation of Jiangsu Province(No.BK20190905);the Priority Academic Program Development of Jiangsu Higher Education Institutions。

摘　　要：Series of azobenzene-bridged pillar[5]arene-based [3]rotaxanes with different alkyl chain length of guest molecules were constructed by threading-endcapping method with alkylenetriazole as axile and tetrahydrochromene as endcapping group.The encapsulation of pillar[5]arenes were proved by highresolution mass,^(1) H NMR and NOESY spectra.The photo-responsive property were examined by irradiation of the synthesized [3]rotaxanes with 365 nm and blue light LED,which caused trans to cis and cis to trans isomerization,respectively.Irradiation of corresponding model guest compounds without pillar[5]arene encapsulation resulted in near completely trans to cis and cis to trans isomerization,indicating the existence of pillar[5]arenes is the determining factor for the comprised photo isomerization efficiency.

关 键 词：arene Rotaxane AZOBENZENE Supramolecule Photo-switch 

分 类 号：TQ246[化学工程—有机化工]