申请人:Chisso Corporation
公开号:US05370819A1
公开(公告)日:1994-12-06
A novel, conjugated enyne compound expressed by the following formula (I), which has superior characteristics as an L.C. material and is stable under a usually used environment, and a L.C. composition containing the same are provided: ##STR1## wherein A is 1,4-phenylene or 1,4-cyclohexylene; B, C and D are 1,4-phenylene, 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, pyridine-2,5-diyl or 1,3-pyrimidine-2,5-diyl; L and M are covalent bond, 1,2-ethylene, oxycarbonyl, carbonyloxy, 1,2-ethenylene, 1,2-ethynylene, oxymethylene or methyleneoxy; n, m and l are 0 or 1; X and Z are H or F; R is fluoroalkyl, alkyl, alkoxy, alkoxyalkyl or alkenyl; Y is alkyl, alkoxy, cyano, halogen, cyanate, alkyl or alkoxy having at least one H replaced by halogen; when n is 0, L is covalent bond; when m or n is 0, M is covalent bond; and m, n and l are not simultaneously 0, the compound having a broad L.C. range, a low viscosity and a suitable .DELTA.n, and being applied to various uses, and reducing the viscosity of L.C. composition containing the same and enlarging the L.C. operation range.
提供一种由以下式(I)表示的新型共轭烯烃化合物,其具有作为液晶材料的优越特性,在通常使用的环境下稳定,并且包含相同化合物的液晶组成物:##STR1## 其中A是1,4-苯撑或1,4-环己撑;B、C和D是1,4-苯撑、1,4-环己撑、1,3-二噁烷-2,5-二基、吡啶-2,5-二基或1,3-嘧啶-2,5-二基;L和M是共价键、1,2-乙烯、羧酸酯、羰氧基、1,2-乙烯基、1,2-乙炔基、氧甲基或甲氧基;n、m和l为0或1;X和Z为H或F;R为氟烷基、烷基、烷氧基、烷氧基烷基或烯基;Y为烷基、烷氧基、氰基、卤素、氰酸酯、烷基或烷氧基,其中至少有一个氢被卤素取代;当n为0时,L为共价键;当m或n为0时,M为共价键;且m、n和l不同时为0,该化合物具有广泛的液晶范围、低粘度和适当的.DELTA.n,并适用于各种用途,降低包含相同化合物的液晶组成物的粘度并扩大液晶操作范围。