Liquid crystalline isothiocyanates with a dioxane ring and liquid crystalline admixtures containing the same
申请人:Wojskowa Akademia Techniczna im.
Jaroslawa Dabrowskiego
公开号:EP0170082A2
公开(公告)日:1986-02-05
New compounds of the general formula:
wherein the symbols X stand for carbon atom bonded with two hydrogen atoms (-CH2- group) and the symbols Z stand for oxygen atom, or the symbols X stand for oxygen atom and the symbols Z stand for carbon atom bonded with two hydrogen atoms (-CH2- group), m is an integer of 1 to 2, R represents an alkyl (H2n+1Cn) or a 4-alkylphenyl (H2n+1Cn-CeH4) or an alkyl biphenyl (H2n+1Cn-C6H4-C6H4) or an alkylcyclohexylphenyl group (H2n+1Cn-C6H10-C6H4), the term alkyl group signifies an alkyl chain containing 1 to 15 carbon atoms or it also signifies a branched-chain alkyl group C2H5-CH(CH3)-(CH2)k, where k is an integer of 1 to 3, have utility as liquid crystals. A process for manufacturing compounds of the general formula I. Liquid crystalline admixtures containing those compounds and a way of selection of their compositions to obtain the admixtures which exhibit smectic, smectic and nematic or only smectic properties as well as their use in electrooptical devices is described.
通式如下的新化合物
其中符号 X 代表与两个氢原子(-CH2-基团)结合的碳原子,符号 Z 代表氧原子,或符号 X 代表氧原子,符号 Z 代表与两个氢原子(-CH2-基团)结合的碳原子,m 为 1 至 2 的整数、R 代表烷基 (H2n+1Cn) 或 4-烷基苯基 (H2n+1Cn-CeH4) 或烷基联苯 (H2n+1Cn-C6H4-C6H4) 或烷基环己基苯基 (H2n+1Cn-C6H10-C6H4)、烷基是指含有 1 至 15 个碳原子的烷基链,或者也指支链烷基 C2H5-CH(CH3)-(CH2)k,其中 k 是 1 至 3 的整数。通式 I 化合物的制造工艺。此外,还介绍了含有这些化合物的液晶混合物及其成分的选择方法,以获得具有共晶、共晶和向列晶特性或仅具有共晶特性的混合物,以及它们在光电设备中的用途。