液晶介质中的超分子聚合:向多功能核心柱状液晶的模块化合成
Keiichi Yano1, Takahiro Hanebuchi1, Xu-Jie Zhang1
1Department of Chemistry and Biotechnology, School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8656 , Japan.
Journal of the American Chemical Society
|May 30, 2019
概括
研究人员开发了一种创建核心柱状液晶 (LC) 的新方法. 这种新型的LC材料可以通过电场和磁场对齐,从而实现单向排序.
科学领域:
- 超分子化学
- 材料科学
- 流体晶体
背景情况:
- 超分子聚合提供了复杂材料的模块化途径.
- 柱状液晶具有独特的自组合特性.
- 控制LC相的方向对于设备应用至关重要.
研究的目的:
- 扩展模块化合成方法,用于构建核心柱状液晶 (LC).
- 开发第一个由电场和磁场可导向的核心外柱状LC.
- 研究特定的性二胺基衍生物在阴性LC介质中的自我组装行为.
主要方法:
- 在阴性液晶 (LC) 介质 (4-cyano-4 ahydroxypentyloxybiphenyl, 5OCB) 中对性二胺基衍生物 (NODiskNH*) 的超分子聚合.
- 由此产生的液晶相的特征及其结构排序.
- 研究材料对电磁场的反应.
主要成果:
- 在5OCB (1: 3摩尔比) 中NO盘NH*的超分子聚合诱导了结构秩序增加的中相过渡.
- 在113°C和51°C之间形成了一个光学活跃的单一LC相,具有六角排列的核心柱形状.
- 核心外柱状LC表现出前所未有的电场和磁场导向性,导致单向柱状排序.
结论:
- 模块化合成方法可用于开发多功能柱状LC.
- 通过电场和磁场导向的第一个核心外柱状LC成功构建.
- 这种新材料为需要控制LC对齐的先进应用提供了可能性.
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