Synthesis, Phase Structure and Photophysical Property of A Liquid Crystalline Molecule with High Emission Efficiency both in Solution and Solid State

被引：0
|
作者：
Zheng J. [1 ]
Cheng X. [1 ]
Ge Y. [1 ]
Gong J. [1 ]
Xu P. [1 ]
机构：
[1] Department of Applied Chemistry, College of Chemical Engineering, Nanjing Forestry University, Nanjing
来源：
Faguang Xuebao/Chinese Journal of Luminescence | 2023年 / 44卷 / 05期
关键词：
aggregation-caused quenching（ACQ）; aggregation-induced emission（AIE）; liquid crystal; multi-state emissive;
D O I：
10.37188/CJL.20220428
中图分类号：
学科分类号：
摘要：
Organic luminogens can be divided roughly into two main classes：aggregation-caused quenching （ACQ）and aggregation-induced emission（AIE）molecules，which are highly emissive only in single molecular and aggregated state，respectively. In this work，we synthesized a liquid crystalline molecule（MS⁃12）with high emission efficiency both in solution and solid state and studied its liquid crystalline and photophysical properties. MS⁃12 consists of a long rod-like core ended by two Percec-type dendrons. The rigid core is composed of cyanostilbene and diphenylacetylene units，featuring a D-A-π-A-D emitter. It renders a hexagonal columnar liquid crystalline phase in bulk state，with four molecules in each monomolecular-thick（～0. 44 nm）hexagonal unit cell. In dilute solution，it behaves like a ACQ molecule with a quantum yield（QY）up to 78. 1% in THF. It shows a strong AIE character in condensed state，with a QY of 59. 6% in bulk liquid crystalline state. This work provides a general strategy to multi-state emissive organic luminogens，those in particular with liquid crystalline properties. © 2023 Chines Academy of Sciences. All rights reserved.
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页码：863 / 872
页数：9
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