申请人:Wojskowa Akademia Techniczna
公开号:US04849130A1
公开(公告)日:1989-07-18
Liquid crystalline ethane derivatives by the described method in order to form liquid crystalline compositions with known liquid crystalline compounds have a general formula I: ##STR1## wherein, if ring A idicates 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 if 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 C.sub.n H.sub.2n+1 or a non-branched alkoxy group C.sub.n H.sub.2n+1 O or an alkylcarboxylic group C.sub.n H.sub.2n+1 COO or an alkyl carbonato group C.sub.n H.sub.2n+1 OCOO or a branched alkyl chain CH.sub.3 --CH.sub.2 --CH(CH.sub.3)--(CH.sub.2).sub.k -- or a branched alkoxy group CH.sub.3 --CH.sub.2 --CH(CH.sub.3)--(CH.sub.2).sub.k --O, where n is an integer number and assumes values from 1 to 12, k is an integer number and assumes values from 1 to 3 and l and m assume values 1 or 0 fulfilling the condition that l+m>0, and if ring A denotes 1.4-disubstituted bicyclo[2,2,2] octane ring also l+m=0. Liquid crystalline compositions containing the compound of formula I are characterized by low viscosity and are applied in displays.
通过所述方法制备液晶乙烷衍生物,以形成与已知液晶化合物的液晶组合物,其具有一般式I:##STR1##其中,如果环A表示1,4-取代苯环,则环B表示1,4-取代苯环或1,4-顺式取代环己烷环或1,4-取代双环[2,2,2]辛烷环或2,5-取代嘧啶环或2,5-取代1,3-二氧杂环,或者如果环B表示1,4-取代苯环,则A表示1,4-顺式取代环己烷环或1,4-取代双环[2,2,2]辛烷环或2,5-取代嘧啶环或2,5-取代1,3-二氧杂环,R表示正的烷基链C.sub.n H.sub.2n+1或非支链的烷氧基C.sub.n H.sub.2n+1 O或烷基羧基C.sub.n H.sub.2n+1 COO或烷基碳酸酯基C.sub.n H.sub.2n+1 OCOO或支链烷基链CH.sub.3 --CH.sub.2 --CH(CH.sub.3)--(CH.sub.2).sub.k --或支链烷氧基CH.sub.3 --CH.sub.2 --CH(CH.sub.3)--(CH.sub.2).sub.k --O,其中n为整数,取值范围为1到12,k为整数,取值范围为1到3,l和m取值为1或0,满足l+m>0,如果环A表示1,4-二取代双环[2,2,2]辛烷环,则l+m=0。含有式I化合物的液晶组合物具有低粘度,并用于显示器中。