In situ thermoresponsive supramolecular assembly for switchable circularly polarized luminescence  

作　　者：Menghan Pan Gong Zhang Haotian Ma Xiaoxiao Cheng Jieai Li Wei Zhang 

机构地区：[1]State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials,Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials,Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,China [2]School of Chemical and Environmental Engineering,Anhui Polytechnic University,Wuhu 241000,China

出　　处：《Science China Chemistry》2024年第7期2362-2372,共11页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(22301206,22301208 and 92356305);the Natural Science Foundation of Anhui Province(2308085J15);the China Postdoctoral Science Foundation(2022M722312);the Jiangsu Natural Science Foundation(BK20230505);the Jiangsu Funding Program for Excellent Postdoctoral Talent;the Natural Science Foundation of Anhui Provincial Higher Education Institutions(2023AH010012)。

摘　　要：The dynamic regulation of circularly polarized luminescence(CPL)holds profound significance in various fields,such as highlevel information storage and encryption.Here we developed a chiral amphiphilic molecule,CPSB-GLU-PEG350(CGP),composed of aggregation-induced emission(AIE)chromophores(Z)-4-(1-cyano-2-phenylvinyl)benzoic acid(CPSB),a chiral linker Glutamic acid and polyethylene glycol(PEG)thermoresponsive segments.Within the self-assembled supramolecular system formed by CGP,we have achieved in-situ temperature-responsive chiral structures,facilitating the thermal control switch of the CPL signal.Molecular dynamics simulations demonstrate the distinct behaviors of AIE and PEG units during the temperature-variable assembly process.Furthermore,by co-assembling achiral dye molecules with CGP,we have expanded the color range of the temperature-responsive CPL assembly system in situ and confirmed the occurrence of circularly polarizedF?rster resonance energy transfer(C-FRET)phenomenon in this process,which successfully enriched the strategies for in-situ CPL control in aqueous phases.In addition,the contactless radiative energy transfer of CPL can also be realized in this system,exhibiting more flexible temperature regulation of the CPL signal.This study provides a convenient and universal strategy for the construction of dynamically smart chiroptical materials.

关 键 词：circularly polarized luminescence in-situ thermoresponsive supramolecular assembly energy transfer 

分 类 号：O641.3[理学—物理化学] TB381[理学—化学]