申请人:Takasago International Corporation
公开号:EP0739884A2
公开(公告)日:1996-10-30
A liquid crystal compound represented by formula (I) and a liquid crystal composition containing the same. The compound exhibits an antiferroelectric liquid crystal phase and has good compatibility with known liquid crystal compounds.
wherein R1 represents a straight-chain or branched alkyl, alkoxy, alkoxycarbonyl, alkanoyloxy or alkoxycarbonyloxy group having 4 to 16 carbon atoms; R2 represents a straight-chain alkyl group having 4 to 10 carbon atoms or a branched alkyl group containing 1 to 3 carbon atoms in its branch and 4 to 12 carbon atoms in total; X represents an oxygen or sulfur atom; rings A and B each represent an F-substituted or unsubstituted phenylene group, a cyclohexylene group or a divalent nitrogen-containing heterocyclic group, provided that either one of rings A and B is the nitrogen-containing heterocyclic group; ring C represents an F-substituted or unsubstituted phenylene group; and C* represents an asymmetric carbon atom.
一种由式(I)表示的液晶化合物和含有该化合物的液晶组合物。该化合物呈现反铁电液晶相,与已知液晶化合物具有良好的兼容性。
其中 R1 代表具有 4 至 16 个碳原子的直链或支链烷基、烷氧基、烷氧羰基、烷酰氧基或烷氧羰氧基;R2 代表具有 4 至 10 个碳原子的直链烷基或在其支链中含有 1 至 3 个碳原子且总共含有 4 至 12 个碳原子的支链烷基;X 代表氧原子或硫原子;环 A 和环 B 分别代表 F 取代或未取代的亚苯基、环己基或二价含氮杂环基团,条件是环 A 和环 B 中的任一环为含氮杂环基团;环 C 代表 F 取代或未取代的亚苯基;以及 C* 代表不对称碳原子。