Co-assembly of chiral copper(Ⅰ)complexes and achiral polymer for enhanced circularly polarized luminescence  

作　　者：Ting Liu Muxin Yu Yangxingyu Ye Yunfang Zhao Zhijia Li Zhiyuan Wu Feilong Jiang Lian Chen Maochun Hong 

机构地区：[1]State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences(CAS),Fuzhou 350002,China [2]Organic Optoelectronics Engineering Research Center of Fujian’s Universities,College of Electronics and Information Science,Fujian Jiangxia University,Fuzhou 350108,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Science China Chemistry》2025年第3期935-942,共8页中国科学(化学英文版)

基　　金：supported by the National Key Research and Development Program of China (2018YFA0704502 and 2019YFA0210402);National Natural Science Foundation of China (22271280,22101047,and 21921001);the Natural Science Foundation of Fujian Province (2020J05064)。

摘　　要：Circularly polarized luminescence(CPL)has attracted growing attention for their promising applications in chiral functional devices.Achieving CPL materials with both high luminescence dissymmetry factors(g_(lum))and emission efficiency is attractive but remains great challenges.In this study,a pair of chiral Cu(Ⅰ)complexes named R/S-CuI with C_(2) symmetry were synthesized,exhibiting no emission in solution and weak CPL with g_(lum)=±3.3×10^(-3)in crystalline state.Transparent chiral films(R/S-CuI-film)were developed through the co-assembly of R/S-CuI and achiral polymer PMMA.The films show bright green luminescence with the quantum yields about 200 times higher than those in crystalline state.Meanwhile,the maximum|g_(lum)|value is also amplified by approximately 2.5 times,reaching to 8.7×10^(-3).Mechanism investigation suggests that the notable enhancement of luminescence efficiency can be ascribed to the restriction of the intramolecular motions and the elimination of the oxygen quenching effect,while the improvement in g_(lum)values may be explained by the chirality transfer from the axially chiral molecule R/S-CuI to the achiral polymer PMMA.Furthermore,R/S-CuI-film were used for advanced information encryption applications based on its CPL characteristics.This work may provide new inspirations for the construction of CPL-active films with high performance,thereby expediting their further development.

关 键 词：metal-organic complexes circularly polarized luminescence achiral polymer chiral film chirality transfer 

分 类 号：O641.4[理学—物理化学] TB383.2[理学—化学]