作者:Richard J. Mandle、Stephen J. Cowling、John W. Goodby
DOI:10.1002/chem.201702742
日期:2017.10.17
Recently, a polar, rod-like liquid-crystalline material was reported to exhibit two distinct nematic mesophases (termed N and NX ) separated by a weakly first-order transition. Herein, we present our initial studies into the structure-property relationships that underpin the occurrence of the lower-temperature nematic phase, and report several new materials that exhibit this same transformation. We
最近,据报道,一种极性的棒状液晶材料显示出两个不同的向列中间相(称为N和NX),它们被弱的一阶跃迁分开。在本文中,我们介绍了对构成低温向列相的基础的结构-性质关系的初步研究,并报告了几种表现出相同转变的新材料。我们已经准备了具有显着增强的温度范围的材料,从而使我们能够使用小角度X射线散射对高温和低温向列相进行详细研究。我们观察到d间距的连续变化,而不是相变时的急剧变化,这一结果与两个向列相之间的过渡相一致,这两个相的结构可能是简并的。