Circularly polarized luminescence switch based on a photochromic europium(Ⅲ) helicate derived coordination polymer  

作　　者：Mei Li Yanyan Zhou Jingya Li Wenru Huang Zhiwei Yao Yuying Li Ting Gao Pengfei Yan Hongfeng Li 

机构地区：[1]Key Laboratory of Functional Inorganic Material Chemistry,Ministry of Education,School of Chemistry and Materials Science,Heilongjiang University,Harbin 150080,China [2]State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Institution,Baotou 014030,China

出　　处：《Chinese Chemical Letters》2024年第2期272-277,共6页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52273263,52203219,51872077 and 52073080);Science and Technology Plan of Inner Mongolia Autonomous Region(No.2020GG0164);Scientific Research Project of Basic Scientific Research Operating Expenses of Colleges and Universities in Heilongjiang Province(Nos.2021-KYYWF-0029 and 2021-KYYWF-0041).

摘　　要：Chiroptical switches based on circularly polarized luminescence(CPL)have shown the promising applications in advanced information technologies.Herein,a pair of lanthanide coordination polymer enantiomers[Eu_(2)(L^(R))_(3)(BTFPO)_(2)]_(n) and[Eu_(2)(L^(S))_(3)(BTFPO)_(2)]_(n) with light-regulated CPL property are designed,which are assembled by a chiral binuclear triple-stranded Eu^(3+) helicates[Eu_(2)(L^(R/S))_(3)]coordinated with two photochromic triphenylphosphine oxides(BTFPO).Upon the alternative UV and 526 nm light irradiation,the complexes show the reversible photochromism,PL and CPL responses.Notably,the luminescence dissymmetry factor,g lum of ^(5)D_(0)→^(7)F_(1)(591 nm)transition shows an obvious increase from 0.19 to 0.29 before and after 275 nm light irradiation.Additionally,the emission from Eu^(3+) center is not completely quenched in closed-ring state due to the low photocyclization(Ф_(o-c))quantum yield of the polymer.The partial maintenance of emissive intensity is of essential importance for the monitor of CPL signal.More importantly,the CPL photo-switching property of the complexes in solid hybrid film is maintained,and still displays the enhanced CPL emission in photostationary state.Further,the potential applications of the doping film in logic gate and anti-counterfeiting were investigated.

关 键 词：Chiroptical switches Coordination polymer CPL ANTI-COUNTERFEITING Logic gate 

分 类 号：TM564[电气工程—电器] TQ317[化学工程—高聚物工业]