文献类型：期刊文献

英文题名：Unraveling Dual Aggregation-Induced Emission Behavior in Steric-Hindrance Photochromic System for Super Resolution Imaging

作者：Yang, Hong[1,2];Li, Mengqi[1,2];Li, Chong[1,2,3];Luo, Qianfu[1,2];Zhu, Ming-Qiang[1,2,3];Tian, He[1,2];Zhu, Wei-Hong[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat,Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Shanghai Key Lab Funct Mat Chem,Inst Fine Chem, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Joint Int Res Lab Precis Chem & Mol Engn,Sch Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Shanghai Key Lab Funct Mat Chem,Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan Natl Lab Optoelect, Wuhan 430074, Hubei, Peoples R China

年份：2020

卷号：59

期号：22

起止页码：8560

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20195107871417);WOS:【SCI-EXPANDED(收录号:WOS:000491068500001)】；

基金：This work was financially supported by NSFC/China for Science Center Program (21788102), Creative Research Groups (21421004), and Key Project (21636002), and National key Research and Development Program (2016YFA0200300), Shanghai Municipal Science and Technology Major Project (Grant No.2018SHZDZX03), and Program of Introducing Talents of Discipline to Universities (B16017).

语种：英文

外文关键词：aggregation-induced emission; diarylethene; photochromism; steric hindrance; super resolution imaging

摘要：Unprecedented dual aggregation-induced emission (AIE) behavior based on a steric-hindrance photochromic system is presented, with incorporation one or two bulky aryl groups, resulting in different flexibleness. The dual AIE behavior of open and closed isomers can be explained by restriction of intramolecular rotation (RIR), restriction of intramolecular vibration (RIV), and intermolecular stacking. The large bulky benzothiophene causes restricted rotation, enhancing the emission of open form in solution and weak pi-pi molecular packing, thereby efficiently enhancing the luminescence performance in the solid state. With incorporation of two large bulky benzothiophene groups, BBTE possesses the most outstanding AIE activity, undergoing highly efficient and reversible off-to-on fluorescence in film upon alternating UV and visible light irradiation along with excellent fatigue resistance. The off-to-on fluorescent photoswitch is successfully established in super resolution imaging.