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南京林业大学化学工程学院 应用化学系, 江苏 南京 210037
[ "郑军峰(1983-),男,河南平舆人,博士,讲师,2012 年于北京大学获得博士学位,主要从事高分子合成、自组装与功能的研究。Email: zjfphd@163. com" ]
[ "徐鹏(1981-),男,江苏东台人,博士,副教授,2008 年于吉林大学获得博士学位,主要从事高分子合成与组装的研究。Email: xupeng5993@126. com" ]
收稿日期:2022-12-25,
修回日期:2023-01-12,
纸质出版日期:2023-05-05
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郑军峰,程晓帆,葛云翀等.固液双态高效发光的液晶分子的合成、相结构及光物理性质[J].发光学报,2023,44(05):863-872.
ZHENG Junfeng,CHENG Xiaofan,GE Yunchong,et al.Synthesis, Phase Structure and Photophysical Property of A Liquid Crystalline Molecule with High Emission Efficiency both in Solution and Solid State[J].Chinese Journal of Luminescence,2023,44(05):863-872.
郑军峰,程晓帆,葛云翀等.固液双态高效发光的液晶分子的合成、相结构及光物理性质[J].发光学报,2023,44(05):863-872. DOI: 10.37188/CJL.20220428.
ZHENG Junfeng,CHENG Xiaofan,GE Yunchong,et al.Synthesis, Phase Structure and Photophysical Property of A Liquid Crystalline Molecule with High Emission Efficiency both in Solution and Solid State[J].Chinese Journal of Luminescence,2023,44(05):863-872. DOI: 10.37188/CJL.20220428.
常见的有机发光分子主要有聚集导致猝灭(ACQ)分子和聚集诱导发光(AIE)分子。前者仅在单分子态(如稀溶液)高效发光,而后者仅在聚集态(如固态)高效发光。本工作中,我们合成了一种在稀溶液和聚集态均能高效发光的液晶分子(
MS⁃12
),并表征了其液晶性质和光物理性质。
MS⁃12
的两端为树枝单元,中间为长棒状的刚性核,可看作典型的Phasmid型液晶基元;刚性核由氰基二苯乙烯(AIE单元)和苯炔苯(ACQ单元)单元构成;由于氰基的强吸电子效应,
MS⁃12
具有D
⁃
A
⁃
π
⁃
A
⁃
D的结构特征。
MS⁃12
在固态形成六方柱状液晶相,单分子层厚度(~0.44 nm)的单胞内含有~4个分子;其在稀溶液态高效发光,在四氢呋喃中荧光量子产率(QY)~78.1%,在固态表现出AIE分子的性质,在本体液晶态的QY~59.6%。本研究为多态发光分子的设计,尤其是多态发光液晶分子的设计提供了有效的方案。
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.
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郑军峰(1983 -) , 男 , 河南平舆人 , 博士 , 讲师 , 2012年于北京大学获得博士学位 , 主要从事高分子合成、自组装与功能的研究 。. doi: 10.1039/c8sc01377b http://dx.doi.org/10.1039/c8sc01377b
E⁃mail: zjfphd@163 . com . doi: 10.1039/c8sc01377b http://dx.doi.org/10.1039/c8sc01377b
徐鹏(1981 -) , 男 , 江苏东台人 , 博士 , 副教授 , 2008年于吉林大学获得博士学位 , 主要从事高分子合成与组装的研究 。. doi: 10.1039/c8sc01377b http://dx.doi.org/10.1039/c8sc01377b
E⁃mail: xupeng5993 @ 126 . com . doi: 10.1039/c8sc01377b http://dx.doi.org/10.1039/c8sc01377b
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