液晶与显示, 2013, 28 (4): 510, 网络出版: 2013-08-28
含链端烯基负性液晶单体的合成及其性能研究
Preparation and Characteristics of Terminal Alkeny-Bearing Lateral Fluoro-Benzene Negative Liquid Crystals
液晶 负性液晶 含氟液晶 链端烯基 liquid crystals negative liquid crystal fluorinated liquid crystal terminal alkenyl-bearing liquid crystal
摘要
链端烯基液晶化合物由于具有较好的与其他液晶的互溶性、较低的黏度(尤其是较低的旋转黏度γ1), 已经应用于TN、STN、TFT等多种类型的液晶混合物中, 但其合成难度较大。文中讨论了含链烯基及苯环侧向氟取代的介电各向异性为负性的液晶单体的合成方法, 该方法主要采用氯丙烯格氏试剂和含不同取代基的苄氯偶联反应引入链烯基, 具有成本低、合成路线短等优点。测试了合成液晶化合物的熔点、清亮点、双折射、介电各向异性等液晶参数, 并对其结构和性能之间的关系进行了分析讨论。
Abstract
Terminal alkeny-bearing liquid crystal compounds has been used in TN, STN, TFT and many other kinds of types of liquid crystal mixture, due to its advantages of solubility with other liquid crystals, low viscosity (especially low rotary viscosity γ1), but its synthetic difficulty is greater.This paper reports a modified synthetic method for the synthesis of terminal alkeny-bearing, lateral fluoro-benzene negative liquid crystals via the cross-coupling reactions of allyl chloride grignard reagent with substituted benzyl chlorides, which has high yields and low-cost. The liquid crystal characteristics of the prepared compounds are also investigated.
员国良, 郑成武, 华瑞茂. 含链端烯基负性液晶单体的合成及其性能研究[J]. 液晶与显示, 2013, 28(4): 510. YUN Guo-liang, ZHENG Cheng-wu, HUA Rui-mao. Preparation and Characteristics of Terminal Alkeny-Bearing Lateral Fluoro-Benzene Negative Liquid Crystals[J]. Chinese Journal of Liquid Crystals and Displays, 2013, 28(4): 510.