Liquid-Crystalline Mesogens Based on Cyclo[6]aramides: Distinctive Phase Transitions in Response to Macrocyclic Host-Guest Interactions
作者:Xiaowei Li、Bao Li、Long Chen、Jinchuan Hu、Chengdanyang Wen、Qingdong Zheng、Lixin Wu、Huaqiang Zeng、Bing Gong、Lihua Yuan
DOI:10.1002/anie.201505278
日期:2015.9.14
hexagonal columnar phase mediated by macrocyclic host–guest (H–G) interactions between the macrocycles and alkylammonium salts. The phase transition, triggered by an organic guest engaging in H–G interactions with a macrocyclic cavity, provides a novel strategy for manipulating the properties of liquid‐crystalline materials. The crystal structure of a homologous cyclo[6]aramide reveals a disk‐shaped, near‐planar
产生对客体包封反应的大环液晶元提出了重大挑战。环[6]芳酰胺是一种具有氢键约束主链的大环,在相当宽的温度范围内(包括在室温下)表现出热致性层状,盘状向列型,六边形和矩形柱状中间相。另外,环[6]芳酰胺显示出由大环与烷基铵盐之间的大环主客体(H-G)相互作用介导的从层状到六方柱状相的不寻常的中间相转变。由有机客体参与与大环腔的H–G相互作用而触发的相变,为操纵液晶材料的性质提供了一种新颖的策略。同源环[6]芳酰胺的晶体结构显示为盘状,