Liquid crystalline compounds having a silane diyl group, liquid crystal compositions comprising the same and liquid crystal display devices
申请人:CHISSO CORPORATION
公开号:EP1160251A2
公开(公告)日:2001-12-05
Liquid crystalline compounds which have large dielectric anisotropy, high electrical insulation properties (high specific resistance or high voltage holding ratio), small temperature dependence, broad liquid crystal phase temperature range, excellent compatibility and low viscosity and which are represented by formula (1)
A4 each independently represent 1,4-cyclohexylene,1,4-phenylene, etc.; R1 represents C1-C20 alkyl in which any methylene may be replaced by -O-, etc.; R2 represents halogen, cyano or C1-C10 alkyl in which at least one hydrogen is replaced by halogen; and at least one of Z1, Z2 and Z3 represents -SiH2CH2- or -CH2SiH2-. Further, liquid crystal compositions comprising at least one liquid crystalline compound of formula (1) and liquid crystal display devices composed of the compositions, which can exhibit low threshold voltage, high electrical insulation properties and low viscosity.
具有大介电各向异性、高电绝缘性能(高比电阻或高耐电压比)、温度依赖性小、液晶相温度范围广、优异的相容性和低粘度的液晶化合物,其化学式为(1)中A4分别独立表示1,4-环己烯基、1,4-苯基等;R1表示C1-C20烷基,其中任何亚甲基可能被-O-等取代;R2表示卤素、氰基或C1-C10烷基,其中至少有一个氢原子被卤素取代;Z1、Z2和Z3中至少有一个表示-SiH2CH2-或-CH2SiH2-。此外,液晶化合物至少包括化学式(1)中的一种液晶化合物的液晶组合物和由该组合物组成的液晶显示器件,可表现出低阈值电压、高电绝缘性能和低粘度。