申请人:Chisso Corporation
公开号:US06576303B1
公开(公告)日:2003-06-10
Novel liquid crystal compound having a negative and absolutely large value of dielectric anisotropy, being excellent in compatibility with other liquid crystalline compounds at a low temperature and being stable chemically and physically, as well as a liquid crystal composition comprising this compound, and a liquid crystal display device comprising this liquid crystal composition are provided, said compound is expressed by the general formula (1):
R1—A1—B1—A2—B2—A3—B3—Z—B4—A4—R2 (1)
wherein A1, A2, A3 and A4 represent a single bond, 1,4-cyclohexylene, 1,4-phenylene which may be substituted with a fluorine atom(s) or the like; B1, B2, B3 and B4 represent a single bond, 1,2-ethylene, 1,2-ethenylene, 1,2-ethynylene, oxymethylene, methyleneoxy or the like; R1 and R2 represent an alkyl group having 1 to 10 carbon atoms or the like; and Z represents (I) to (VI):
wherein X represents H or F, and Y represents difluoromethyl group, difluoromethoxy group, formyl group or carboxyl group.
提供一种具有负且绝对大的介电各向异性值的新型液晶化合物,其在低温下与其他液晶化合物具有良好的相容性,化学和物理稳定性高,以及包括该化合物的液晶组合物和包括该液晶组合物的液晶显示装置,该化合物由通式(1)表示:R1-A1-B1-A2-B2-A3-B3-Z-B4-A4-R2(1),其中A1、A2、A3和A4代表单键,1,4-环己基,1,4-苯基,可以被氟原子或类似物取代;B1、B2、B3和B4代表单键,1,2-乙烯,1,2-乙烯基,1,2-乙炔基,氧甲基,甲氧基或类似物;R1和R2代表具有1至10个碳原子的烷基或类似物;Z代表(I)至(VI):其中X代表H或F,Y代表二氟甲基基团,二氟甲氧基基团,甲酰基或羧基。