Tetracyclic compound having lateral halogen substituent and liquid crystal composition comprising the same
申请人:Chisso Corporation
公开号:US06174458B1
公开(公告)日:2001-01-16
A tetracyclic compound expressed by the following general formula (1)
wherein H1 to H12 represent hydrogen atom at least one of which is replaced by a halogen atom, when either H6 or H8 is replaced by a halogen atom, at least one of the remaining hydrogen atoms is replaced by a halogen atom; R1 and Y1 independently represent an alkyl group, alkoxy group, or alkoxyalkyl group having 1 to 20 carbon atoms, or an alkenyl group having 2 to 20 carbon atoms, one or more methylene group in R1 and Y1 may be replaced by oxygen atom, sulfur atom, dihydrosilylene group, dimethylsilylene group, —CH═CH—, or —C≡C—; and X1, X2, and X3 independently represent a covalent bond, 1,2-ethylene group, or 1,4-butylene group; and a novel liquid crystal composition comprising the tetracyclic compound and having, at the same time, a wide temperature range of a nematic phase, high optical anisotropy, and high chemical stability.
一种四环化合物,其由以下通用公式(1)表示,其中H1到H12代表氢原子,其中至少一个被卤素原子取代,当H6或H8中的一个被卤素原子取代时,其余氢原子中至少有一个被卤素原子取代;R1和Y1分别代表具有1至20个碳原子的烷基基团、烷氧基团或烷氧基烷基团,或具有2至20个碳原子的烯基基团,R1和Y1中的一个或多个亚甲基基团可被氧原子、硫原子、二氢硅基基团、二甲基硅基基团、—CH═CH—或—C≡C—取代;X1、X2和X3分别表示共价键、1,2-乙烯基团或1,4-丁烯基团;以及一种新型液晶组合物,包括该四环化合物,同时具有宽的向列相温度范围、高的光学各向异性和高的化学稳定性。