Memorable full-color circularly polarized luminescence from chiral co-assembled polymer films enabled by multipath transfer  

作　　者：Gong Zhang Yinglong Bao Menghan Pan Nianwei Wang Xiaoxiao Cheng 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》2023年第4期1169-1178,共10页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(92056111,21971180);the China Postdoctoral Science Foundation(2022M722312);the Key Laboratory of Polymeric Material Design and Synthesis for Biomedical Function;the Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions;Jiangsu Funding Program for Excellent Postdoctoral Talent;the Program of Innovative Research Team of Soochow University。

摘　　要：The modulation of circularly polarized luminescence(CPL)is of importance for display and asymmetric chemical synthesis.However,the underlying mechanism of CPL transfer remains rarely studied.Herein,we rationally design a multipath transfer system including multistep chirality transfer(MCT)and sequential fluorescence resonance energy transfer(SFRET),and we are the first to fabricate memorable full-color CPL-active films with a high dissymmetry factor(~10^(-2)).Specifically,(P/M)-helical nanofibers are constructed by co-assembly between an achiral polymer,poly(9,9-di-n-octylfluorene)(PF8),and easy-to-remove R/S-limonene.When matching achiral emitters are added,the PF8 mediates MCT and simultaneously triggers the SFRET process.Furthermore,full-color CPL memory is realized after removing the chiral source.Molecular simulation and structure analysis indicate that the robust helical superstructure of PF8 provides chiral sites to accommodate emitters,which is essential for CPL transfer and memory.This work provides a novel strategy for constructing CPL-active materials in an aggregated state and insights into CPL transfer and memory.

关 键 词：chiral co-assembly chirality transfer multipath transfer memorable full-color CPL achiral polymer 

分 类 号：TQ317[化学工程—高聚物工业]