ABSTRACT

Three sets of new rod-shaped liquid crystals with one terminal fixed branched alkyl chain, other terminal with varying normal alkyl chain, and central naphthalene with terminal branched chain derived symmetric molecules were synthesized and characterized. Chemical structures were confirmed by standard analytical methods. Liquid crystal properties were evaluated with the help of differential scanning calorimetry, polarized optical microscopy and X-ray studies. All the compounds favoured to exhibit highly birefringent smectic and nematic mesophase textures. Further, symmetric naphthalene derivatives preferably exhibited nematic mesophase with elevated transition temperatures.

摘要

合成并表征了三套具有一端固定支链烷基链、另一端具有不同正烷基链和具有末端支链衍生对称分子的中心萘的新型棒状液晶。通过标准分析方法确认化学结构。在差示扫描量热法、偏振光学显微镜和 X 射线研究的帮助下评估液晶特性。所有化合物都倾向于表现出高度双折射的近晶和向列中间相结构。此外，对称萘衍生物优选表现出具有升高转变温度的向列中间相。