申请人:Hoffmann-La Roche Inc.
公开号:US04709030A1
公开(公告)日:1987-11-24
Liquid crystalline mixtures containing compounds of the formula ##STR1## wherein n stands for the number 0 or 1; X.sup.1 and X.sup.2 denote single covalent bonds or one of the symbols X.sup.1 and X.sup.2 also denotes --COO--, --OOC-- or --CH.sub.2 CH.sub.2 --; the rings A.sup.1, A.sup.2 and A.sup.3 represent 1,4-phenylene, 2-fluoro-1,4-phenylene or trans-1,4-cyclohexylene or one of these rings also represents a 2,5-disubstituted pyrimidine ring or a trans-2,5-disubstituted m-dioxane ring; R.sup.1 signifies 4-alkenyl or on a cyclohexyl ring also 2Z-alkenyl; and R.sup.2 denotes alkyl, alkoxy, --CN or --NCS, as well as the manufacture of these compounds and the use for electro-optical purposes are described.
含有以下式化合物的液晶混合物##STR1##其中n代表数字0或1;X.sup.1和X.sup.2表示单共价键或X.sup.1和X.sup.2中的一个符号也表示--COO--,--OOC--或--CH.sub.2 CH.sub.2--;环A.sup.1,A.sup.2和A.sup.3代表1,4-苯撑基,2-氟-1,4-苯撑基或反-1,4-环己撑基,或其中一个环也代表2,5-二取代嘧啶环或反-2,5-二取代间二氧杂环己烷环;R.sup.1表示4-烯基或在环己基环上也是2Z-烯基;R.sup.2表示烷基,烷氧基,--CN或--NCS,还描述了这些化合物的制备以及用于电光目的。