Synthesis and mesomorphic properties of novel Schiff base liquid crystalline EDOT derivatives
作者:Ashwathanarayana Gowda、Arun Roy、Sandeep Kumar
DOI:10.1016/j.molliq.2016.11.010
日期:2017.1
Herein, we reported novel banana liquid crystals derived from ethylenedioxythiophene (EDOT) central unit encompass with Schiff base. Structural charecterization of these compounds was carried out from their spectral and elemental analysis. Physical properties of all the newly synthesized compounds were investigated by polarising optical microscopy, differential scanning calorimetry, thermogravimetric
在本文中,我们报道了衍生自席夫碱的亚乙基二氧噻吩(EDOT)中心单元衍生的新型香蕉液晶。这些化合物的结构表征是通过其光谱和元素分析进行的。通过偏光光学显微镜,差示扫描量热法,热重分析,X射线衍射和拉曼光谱研究了所有新合成的化合物的物理性质。带有EDOT的三环Schiff碱弯曲核化合物是非同晶的,但所有包含五环的Schiff碱都表现出对映中间相行为。较高的同系物在较低温度下显示长距离向列相以及近晶C相。而较低的同系物仅显示N相。这些化合物中的弯曲角介于熔融LC和香蕉LC之间。因此,分子从典型弯曲核LC中观察到的极性有序堆积中逸出。XRD的详细研究表明,较低的同源物中存在N相,较高的同源物中存在Sm C相。