Strong Aggregation-Induced CPL Response Promoted by Chiral Emissive Nematic Liquid Crystals (N*-LCs)
Strong Aggregation-Induced CPL Response Promoted by Chiral Emissive Nematic Liquid Crystals (N*-LCs)
复制标题
手性发射向列液晶 (N-LC) 促进强聚集 — 诱导 CPL 响应
DOI：
10.1002/chem.201801186
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发表时间：
2018-08-27
影响因子：
4.3
通讯作者：
Cheng, Yixiang
中科院分区：
文献类型：
--
作者：
Li, Xiaojing;Li, Qian;Cheng, Yixiang
本文设计了一种聚集态的聚集诱导发射（AIE）手性荧光发射体（R/S-BINOL-CN对映体）。将这种具有AIE活性的R/S-BINOL-CN对映体掺杂到普通的非手性手性液晶中，制备了手性发射的手性液晶（N*-LC（N-LC，E7）可以自组装为规则的平面Grandjean织构，导致聚集诱导的圆偏振发光（AI-CPL）信号的高发光不对称因子（g（lum））高达0.41，这可归因于来自极性氰基的偶极相互作用和掺杂剂R/S-BINOL-CN的联萘部分与主体分子（E7）的联苯基之间的π-π相互作用。
In this paper we designed a kind of aggregation-induced emission (AIE) chiral fluorescence emitters (R/S-BINOL-CN enantiomers) in the aggregate state. Chiral emissive nematic liquid crystals (N*-LCs) prepared by doping this kind of AIE-active R/S-BINOL-CN enantiomers into a common achiral nematic liquid crystal (N-LC, E7) can self-assemble as the regularly planar Grandjean texture leading to high luminescence dissymmetry factor (g(lum)) of aggregation-induced circularly polarized luminescence (AI-CPL) signal up to 0.41, which can be attributed to dipolar interactions from polar cyano groups and pi-pi interactions between binaphthyl moiety of the dopant R/S-BINOL-CN and biphenyl group of the host molecules (E7).