Abstract

Liquid crystals (LCs), whose refractive index can be changed by light irradiation, can be used as photoresponsive optical materials. In this study, an LC viologen was proposed as a novel photoresponsive compound that induced a change in the alignment of LC molecules (mesogens). An extended viologen with an asymmetric core, that exhibits a low-order LC phase at room temperature, was mixed with the well-known nematic LC compound (5CB) to prepare homogeneously aligned films. The change in the alignment of the mesogens was successfully induced by triggering a one-electron reduction reaction of the viologen moieties by light irradiation.

中文翻译：

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使用紫精的减少作为触发剂的光致介晶排列变化

摘要

液晶 (LC) 的折射率可通过光照改变，可用作光敏光学材料。在这项研究中，提出了一种 LC 紫精作为一种新型光敏化合物，可引起 LC 分子（介晶）排列的变化。将具有不对称核的扩展紫精在室温下呈现低阶 LC 相，将其与众所周知的向列 LC 化合物 (5CB) 混合以制备均匀排列的薄膜。通过光照射触发紫精部分的单电子还原反应，成功诱导了介晶排列的变化。