Liquid crystalline ethane derivatives, their preparation and the liquid crystal compositions containing same
申请人:Wojskowa Akademia Techniczna im.
Jaroslawa Dabrowskiego
公开号:EP0227004A1
公开(公告)日:1987-07-01
Liquid crystalline ethane derivatives prepared by the described method in order to form liquid crystalline compositions with known liquid crystalline compounds have a general formula 1 :
wherein, when ring A indicates a 1,4-substituted benzene ring, then ring B indicates 1,4-substituted benzene ring or 1,4- trans substituted cyclohexane ring or 1,4-substituted bicyclo [2,2,2] octane ring or 2,5-substituted pyrimidine ring or 2,5- substituted 1,3-dioxane ring, or when ring B indicates a 1,4- substituted benzene ring, then A indicates 1,4-trans substituted cyclohexane ring or 1,4-substituted bicylo [2,2,2] octane ring or 2,5-substituted pyrimidine ring or 2,5-substituted 1,3-dioxane ring, and R indicates a normal alkyl chain CnH2n-1 or a non-branched alkoxyl group CnH2n+1O or an alkylcarboxylic group CnH2n+1COO or an alkylcarbobato group CnH2n+1OCOO or a branched alkyl chain CH3-CH2-CH/CH3/-/ CH2/k ora vbranched alkoxy group CH3-CH2-CH/CH3/-/CH2/k-O, n is an integer number and assumes values from 1 to 12, k is an integer number and assumes a values from 1 to 3, and 1 and m assume values 1 or 0.
Liquid crystalline compositions containing the compound of formula 1 are characterized by low viscosity and are applied displays.
为与已知液晶化合物形成液晶组合物而通过所述方法制备的液晶
乙烷衍
生物具有通式 1 :
其中,当环A表示1,4-取代的苯环时,则环B表示1,4-取代的苯环或1,4-反式取代的
环己烷环或1,4-取代的双环[2,2,2]
辛烷环或2,5-取代的
嘧啶环或2、5-取代的 1,3-
二恶烷环,或当环 B 表示 1,4-取代的苯环时,则 A 表示 1,4-反式取代的
环己烷环或 1,4-取代的双环 [2,2,2]
辛烷环或 2,5-取代的
嘧啶环或 2、R 表示正常烷基链 CnH2n-1 或非支链烷氧基基团 CnH2n+1O 或烷基羧基基团 CnH2n+1COO 或烷基羧基基团 CnH2n+1OCOO 或支链烷基链
CH3-
CH2-CH/ // /k 或支链烷氧基基团 - -CH/ // /k-O 、n 为整数,取值范围为 1 至 12,k 为整数,取值范围为 1 至 3,1 和 m 取值范围为 1 或 0。
含有式 1 化合物的液态结晶组合物的特点是粘度低,可展示应用。