光致变色
发光
铕
镧系元素
材料科学
配位聚合物
光稳态
量子产额
光化学
聚合物
对映体
兴奋剂
化学
光电子学
立体化学
光学
物理
荧光
有机化学
离子
光异构化
催化作用
异构化
复合材料
作者
Mei Li,Yuanlin Zhou,Jingya Li,Wenru Huang,Zhiwei Yao,Yuying Li,Ting Gao,Pengfei Yan,Hongfeng Li
标识
DOI:10.1016/j.cclet.2023.108831
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 [Eu2(LR)3(BTFPO)2]n and [Eu2(LS)3(BTFPO)2]n with light-regulated CPL property are designed, which are assembled by a chiral binuclear triple-stranded Eu3+ helicates [Eu2(LR/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, glum of 5D0→7F1 (591 nm) transition shows an obvious increase from 0.19 to 0.29 before and after 275 nm light irradiation. Additionally, the emission from Eu3+ center is not completely quenched in closed-ring state due to the low photocyclization (Фo-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.
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