Mesomorphism dependence on ortho-substituted lateral groups in isomeric and nonisomeric homologous series
作者:M. D. Khunt、V. C. Kotadiya、U. C. Bhoya
DOI:10.1080/15421406.2015.1068973
日期:2016.1.22
addition to nematic. Transition temperatures and texture were determined by an optical polarizing microscope equipped with a heating stage, and show an odd–even effect for nematic–isotropic and smectic–nematic transition curves. Analytical and spectral data confirm the molecular structures. The average smectic and nematic thermal stabilities are 84.9°C and 94.15°C, respectively. The liquid crystal properties
摘要 为理解和建立分子结构与液晶性质之间的关系,合成并研究了一种新型单体同源系列的α,β-乙烯衍生物。该系列由 12 种新型化合物组成。甲氧基到丙氧基的衍生物不是液晶,丁氧基同系物是单向向列相,戊氧基同系物是单向近晶和对映向列相,其余的同系物(C6-C16)除了向列外都是对映近晶的。转变温度和质地由配备加热台的光学偏光显微镜确定,并显示向列-各向同性和近晶-向列转变曲线的奇偶效应。分析和光谱数据证实了分子结构。平均近晶和向列热稳定性分别为 84.9°C 和 94.15°C。将本系列的液晶特性与结构相似的已知系列进行比较。