Amplified circularly polarized luminescence enabled by photon upconversion in spin-coating cellulose matrix  

作　　者：Lingxia Liu Jinping Chen Tianjun Yu Rui Hu Guoqiang Yang Yi Zeng Yi Li 

机构地区：[1]Key Laboratory of Photochemical Conversion and Optoelectronic Materials,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China [2]Key Laboratory of Photochemistry,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Chemical Letters》2023年第3期313-316,共4页中国化学快报（英文版）

基　　金：financial support from the National Natural Science Foundation of China(Nos.21673264,21573266,21672226 and 22090012);the Youth Innovation Promotion Association of the Chinese Academy of Sciences(Nos.2017032 and 2020035)。

摘　　要：It is of great significance to construct organic circularly polarized luminescence systems(CPL) with large luminescence dissymmetry factors(g_(lum)) for practical applications. Here we report organic CPL systems constructed by merging triplet-triplet annihilation upconversion chromophores in cellulose matrices. The chirality of the matrix is transferred to the achiral chromophores of photon upconversion and then the multistep energy transfer processes of upconversion amplify g_(lum). The g_(lum)value of upconversion CPL in the left-handed ethyl cellulose and the right-handed(acetyl) ethyl cellulose are up to +0.1 and -0.15, respectively. The study provides a straightforward approach for constructing solid organic upconversion CPL materials with large g_(lum), which may expand the application potentials of organic chiroptical materials.

关 键 词：Circularly polarized luminescence Photon upconversion CELLULOSE CHIRALITY Triplet-triplet annihilation 

分 类 号：TB34[一般工业技术—材料科学与工程]