AIE active TPE mesogens with p6mm columnar and Im3m cubic mesophases and white light emission property
AIE active TPE mesogens with p6mm columnar and Im3m cubic mesophases and white light emission property
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具有p6mm柱状和Im3m立方中间相和白光发射特性的AIE活性TPE介晶
DOI：
10.1016/j.molliq.2019.112079
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Xiaohong Cheng
中科院分区：
文献类型：
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作者：
Ruilin Zhang;Hongfei Gao;Juan Yu;Chao Liu;Yuan Tao;Xiaohong Cheng
通过 CuAAC 点击反应，有效合成了由四个柔性 1,2,3-三唑树枝状桨包围的 TPE 核心组成的盘状四苯乙烯 (TPE) 介晶。有趣的是，这种 TPE 介晶不仅可以自组装成六方柱状相，而且可以自组装成很少观察到的本体状态的 3D 胶束 Im 3 m 立方相，以及在有机溶剂中具有球晶或多孔形态的有机凝胶。在此类 TPE 介晶的不同聚集状态下观察到 AIE 效应。当这种TPE介晶分散在向列LC 5CB中时，获得高达6.34的二色性比值。此外，纯TPE介晶和通过用DPP染料掺杂TPE介晶形成的掺杂凝胶的发射颜色都是可调的。值得注意的是，TPE/12+DPP/2C8复合物在凝胶态和聚乙二醇(PEG)薄膜下可以表现出稳定的白光发射(WLE)。
The discotic tetraphenylethylene (TPE) mesogens composing of a TPE core surrounded by four flexible 1, 2, 3-triazole dendritic paddles were synthesized efficiently via CuAAC click reaction. Interesting such TPE mesogens can self-assemble into not only the hexagonal columnar phase but also the rarely observed 3D micellar Im 3¯ m cubic phase in their bulk states, as well as organogels with spherulitic or porous morphologies in organic solvents. AIE effects are observed in different aggregation states of such TPE mesogens. When such TPE mesogens are dispersed in nematic LC 5CB, dichroic ratio values up to 6.34 are obtained. Furthermore the emission colors of both pure TPE mesogens and the doped gel formed by doping TPE mesogen with DPP dye are tunable. Remarkably, TPE/12+DPP/2C8 complex can exhibit stable white light emission (WLE) in gel state and poly (ethylene glycol)(PEG) film.