文献类型：期刊文献

中文题名：嘧啶类液晶化合物的合成及性能研究

英文题名：SYNTHESIS AND DETECTION OF LIQUID CRYSTALS OF THE PYRIMIDINE FAMILY

作者：龙玲[1];荣国斌[1]

机构：[1]华东理工大学化学系,上海200237

年份：1994

卷号：2

期号：3

起止页码：179

中文期刊名：液晶通讯

语种：中文

中文关键词：嘧啶类;液晶;化合物;性能;合成

外文关键词：Pyritnidine;Liquid Crystal;Synthesis

摘要：设计并合成了2—(4’—烷氧基苯基)—5—烷基—嘧啶,2—(2’—氟—4’烷氧基苯基)—5—烷基嘧啶,2—(3—’氟—4’—烷氧基苯基)—5—烷基—嘧啶和2—(4’—烷基联苯基)—嘧啶等四类液晶化合物并测定比较了它们的相态和介电常数,电阻率等物理常数。
Four series of 2-biphenyl and 2-phenyl as well as 2-laterally monofluoro-substi-ituted phenyl pyrimidines were synthesized and their mesomorphic and some physical properties were investigated. They are relatively lowmelting point with transition phases of I -SA-Sc and wide-range Sc phase. The compounds with extra fluorine especially in 2’-position (2) have lower melting points and phase - transition temperature, dielectric anisotropies become negative. It also can be seen that compound 3 have much greater smectic tendencies (particuiarly Sc) , but smectio phase was almost disappeared in 2. These compounds have been used as excellent hosts materials for TN and FLC systems.