Liquid crystalline compound, liquid crystal composition and liquid crystal display element
申请人:Chisso Corporation
公开号:EP0679707A1
公开(公告)日:1995-11-02
A liquid crystalline compound having a high elastic constant ratio (K33/K11) and an immproved solubility thereof in other liquid crystal materials, have the formula:- (1) :
wherein Q represents -CF₃, -CF₂H or -CFH₂; A₁, A₂ and A₃ each independently represent a trans-1,4-cyclohexylene group, a 1,4-phenylene group wherein one or more hydrogen atoms on the ring may be replaced by F, Cℓ or CN, a pyridine-2,5-diyl group or a 1,3-pyrimidine-2,5-diyl group; ring B represents a 1,4-phenylene group or a trans-1,4-cyclohexylene group which can be replaced at its lateral position by groups L, and L₂ noted below; Z₁, Z₂ and Z₃ each independently represent a covalent bond or a group -CH=CH-, -C=C-, -OCO-, -COO-, -CH₂O-, -OCH₂-, -(CH₂)₂- or -(CH₂)₄-; ℓ and m each independently represent 0 or an integer of 1 to 5; o and p each independently represent 0 or 1; L1 and L2 each independently represent H, F or Cℓ; and L3 represents a hydrogen or halogen atom, -CN, -CF3, -CF2H, -CFH₂, -OCF3, -OCF₂H, a C₁-C₁₀ alkyl group or a C₂-C₁₀ alkenyl group [wherein optional non-adjacent methylene groups (-CH₂-) in the alkyl group or the alkenyl group may each independently be replaced by -O-, -S-, -CO-, -OCO- or -COO-].
一种具有高弹性常数比(K33/K11)并能提高在其他液晶材料中溶解度的液晶化合物,其分子式为:(1) :
其中 Q 代表 -CF₃、-CF₂H 或 -CFH₂;A₁、A₂ 和 A₃ 各自独立地代表反式-1,4-环己烯基、环上的一个或多个氢原子可被 F、Cℓ 或 CN 取代的 1,4-亚苯基、吡啶-2,5-二基或 1,3-嘧啶-2,5-二基;环 B 代表 1,4-亚苯基基团或反式-1,4-环己烯基团,其侧边位置可被下述基团 L 和 L₂ 取代;Z₁、Z₂ 和 Z₃ 各自独立地代表共价键或基团 -CH=CH-、-C=C-、-OCO-、-COO-、-CH₂O-、-OCH₂-、-(CH₂)₂- 或 -(CH₂)₄-;ℓ 和 m 各自独立地代表 0 或 1 至 5 的整数;o 和 p 各自独立地代表 0 或 1;L1 和 L2 各自独立地代表 H、F 或 Cℓ;L3 代表氢原子或卤素原子、-CN、-CF3、-CF2H、-CFH₂、-OCF3、-OCF₂H、C₁-C₁₀ 烷基或 C₂-C₁₀ 烯基[其中烷基或烯基中任选的非相邻亚甲基(-CH₂-)可各自独立地被-O-、-S-、-CO-、-OCO-或-COO-取代]。