含氯彎曲型結構混摻藍相液晶材料合成與應用

Abstract

本論文合成出一系列氯取代的香蕉型分子，系列一為單取代及雙取代中心之香蕉型分子結構，其中碳鏈軟段部分為七碳、九碳及十碳，以討論碳數不同，對於產生藍相的關係。並將其分別命名為C7ClC7 、C7Cl2C7、C9ClC9 、C9Cl2C9、C10ClC10。相較於系列一結構，系列二結構在側邊的硬段上加入氟官能基，並且在碳鏈軟段上加入對掌中心，並將其分別命名為C7ClFC7 、C7ClFC7*、C7Cl2FC7、C7Cl2FC7*。本實驗利用混摻的方式將系列一的化合物C7ClC7 、C7Cl2C7、C9ClC9 、C9Cl2C9、C10ClC10與實驗室自行開發出的系列三chiral dopant ISO-F、ISO-F*進行混摻，混摻結果可發現由C9ClC9與ISO-F*的混摻系統誘導出藍相液晶的性質最佳，藍相溫寬可達10度。系列二方面，雖然我們導入對掌性中心與含氟的側向官能基，但並無順利誘導出藍相液晶的性質。這些香蕉型分子，我們利用 DSC、POM、UV-Visible、 NMR、 EA 、MASS來進行驗證分析其物性及化性。

This paper synthesized a series of chlorine-substituted bent-core molecules, the first series are uni- and di- Chlorine-Substituted Bent-Core Structures 。Alkyl chain are 7 carbon,9 carbon,10 carbon。We discuss the effects of different carbon numbers for blue-phase relationship. And were named C7ClC7, C7Cl2C7, C9ClC9, C9Cl2C9, C10ClC10. Structure compared to series one, series two structures on the side of the hard segment by adding fluorine functional groups, and the soft segment in the carbon chain to add a chiral center, and named C7ClFC7, C7ClFC7 *, C7Cl2FC7, C7Cl2FC7 *. In this study, blended series of one way the compounds C7ClC7, C7Cl2C7, C9ClC9, C9Cl2C9, C10ClC10 with laboratory developed chiral dopant ISO-F, ISO-F *, blended results can be found by the C9ClC9 and ISO-F * the system blends the blue phase liquid crystal induced by the nature of the best, wide-temperature blue phase up to 10 degrees. Series two, although we import fluorinated chiral center and lateral functional groups, but not smooth out the blue phase liquid crystal induced by the nature. These bent-core molecules, we use the DSC, POM, UV-Visible, NMR, EA, MASS analysis to verify its physical and chemical properties