含側邊支鏈矽氧烷液晶化合物之合成與鑑定

Synthesis and Characterization of Siloxane Liquid Crystal Compounds Containing Side Chain Groups

本研究合成一系列三個化合物（1M～3M）分別接上雙矽氧烷及三矽氧烷的液晶化合物，共可合成出九個液晶化合物，並以核磁共振光譜來鑑定合成物的結構，其液晶行為則是以微差掃描卡計及偏光顯微鏡鑑定。並探討矽氧烷基團、柔軟間距長度等對液晶相變化、液晶相轉移溫度及相溫度範園的影響。

In this study, we synthesized three liquid crystalline monomers (1M~3M) which were further connected with disiloxane and trisiloxane to achieve nine liquid crystal compounds. The chemical structures of the obtained compounds were identified by nuclear magnetic resonance spectroscopy. Their liquid crystal behavior was characterized by the differential scanning calorimetry (DSC) and optical polarizing microscope. The influences of siloxane groups and space length on liquid crystal phase change, liquid crystal phase transition temperature, and phase temperature range are discussed.