From S,N-Heteroacene to Large Discotic Polycyclic Aromatic Hydrocarbons (PAHs): Liquid Crystal versus Plastic Crystalline Materials with Tunable Mechanochromic Fluorescence.
From S,N-Heteroacene to Large Discotic Polycyclic Aromatic Hydrocarbons (PAHs): Liquid Crystal versus Plastic Crystalline Materials with Tunable Mechanochromic Fluorescence.
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DOI：
10.1002/anie.201801488
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发表时间：
2018-05
影响因子：
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通讯作者：
Wei-Ge Yuan;Xiang-Kui Ren;Mengwei Li;Hongshuang Guo;Yige Han;Mengjiao Wu;Qi Wang;Miaomiao Li
中科院分区：
文献类型：
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作者：
Wei-Ge Yuan;Xiang-Kui Ren;Mengwei Li;Hongshuang Guo;Yige Han;Mengjiao Wu;Qi Wang;Miaomiao Li
开发了一种新型的基于扩大的二苯并[a，c]吩嗪核的双稠多环芳烃（PAH）。由S、N杂原子衍生的具有增加的偶极矩的大的共轭介晶核促进了溶液和本体中高度有序的柱状超结构的形成。基于同一个PAH核，可以形成包括液晶（LC）和塑性晶体（PC）组装体在内的柱状中间相。核心由外围的烷氧基链微妙地调节。这两种介晶都具有机械致变色荧光（MCF）特性，这也是结构依赖性的，并且与不同的中间相形成相关。这是第一次在如此大的共轭介晶体系中实现MCF性质。
A novel type of discotic polycyclic aromatic hydrocarbon (PAH) based on an enlarged dibenzo[a,c]phenazine core has been developed. The large conjugated mesogenic core with increased dipole moment derived from S,N heteroatoms facilitates the formation of highly ordered columnar superstructures both in solution and bulk. Columnar mesophases, including liquid crystal (LC) and plastic crystal (PC) assemblies could form unprecedentedly based on the same PAH core. The cores are delicately modulated by the peripherical alkoxy chains. Both mesogens have mechanochromic fluorescent (MCF) character, which is also structure dependent and correlated with the different mesophase formation. For the first time, MCF properties can be realized in such a large conjugated mesogenic system.