以二炔基與二亞甲氧基為中心核 之架橋之盤狀液晶合成與鑑定

Synthesis and Characterization of Discotic Liquid Crystal Using Diynyl and Dimethoxy Group As Bridge In Its Central Core

本研究成功合成出以二炔基和二亞甲氧基為中心核之架橋之盤狀液晶合成與鑑定，使用核磁共振光譜儀、微差掃描卡計及偏光顯微鏡測得其化學結構、熱性質及液晶相。此盤狀液晶在冷卻過程中會出現層列型液晶相；另於二亞甲氧基尾端引入二丙烯酸酯基，讓此盤狀液晶可進行光聚合反應，這種可UV固化的液晶在光學補償膜中具有潛在的應用。

The discotic liquid crystal was synthesized in this study. The chemical structure, thermal properties and liquid crystalline phase of the liquid crystal were measured by NMR spectroscopy, differential scanning calorimeter and polarized light microscopy. A discotic liquid crystal with two ethynyl groups and two oxymethylene groups used to link to phenyl groups and biphenyl groups with the central phenyl core respectively exhibits smetic phases. This UV-curable liquid crystal has potential application in optical compensation film.