申请人:Chisso Corporation
公开号:US06685995B1
公开(公告)日:2004-02-03
Liquid crystalline compounds suitable for driving at a low voltage and at a wide temperature range, and suitable for high speed response, liquid crystal compositions comprising the compound, and liquid crystal display devices comprising the liquid crystal composition. The crystalline compounds are ester compounds expressed by the general formula (1)
wherein R1 represents e.g. a hydrogen atom; A1 to A5 each independently represent e.g. 1,4-cyclohexylene, 1,4-phenylene, 1-cyclohexene-1,4-diyl, 3-cyclohexene-1,4-diyl, 1-sila-1,4-cyclohexylene, or 4-sila-1,4-cyclohexylene; bonding groups Za to Zd each independently represent e.g. a single bond, —CH2—, —O—, —C≡C—, or an alkylene group or alkenylene group having 2 to 4 carbon; bonding group Ze represents e.g. a single bond, an alkylene group or alkenylene group having 1 to 10 carbon atoms; n1 to n3 are each independently 0 or 1, but n1≦n2≦n3; Y1 and Y2 each independently represent oxygen atom or sulfur atom; R2 represents e.g. a halogen atom, a straight chain or branched alkyl group having 1 to 20 carbon atoms, or straight chain or branched alkenyl group having 2 to 20 carbon atoms; provided that when A5 represents unsubstituted 1,4-phenylene, then Zd is a single bond, and A4 is not 1,4-phenylene; and each atom which constitutes this compound may be replaced by its isotope.
适用于在低电压和广泛温度范围下驱动的液晶化合物,适用于高速响应的液晶组合物,以及包括该液晶组合物的液晶显示器件。这些晶体化合物是由一般式(1)表示的酯化合物,其中R1代表例如氢原子;A1至A5分别独立地表示例如1,4-
环己烷基,1,4-苯基,1-
环己烯-1,4-二基,3-
环己烯-1,4-二基,1-
硅-1,4-
环己烷基或4-
硅-1,4-
环己烷基;键合基团Za至Zd分别独立地表示例如单键,-
CH2-,-O-,-C≡C-,或具有2至4个碳的烷基基团或烯基基团;键合基团Ze表示例如单键,具有1至10个碳原子的烷基基团或烯基基团;n1至n3各自独立地为0或1,但n1≤n2≤n3;Y1和Y2各自独立地表示氧原子或
硫原子;R2代表例如卤素原子,具有1至20个碳原子的直链或支链烷基基团,或具有2至20个碳原子的直链或支链烯基基团;前提是当A5代表未取代的1,4-苯基时,那么Zd是单键,且A4不是1,4-苯基;构成该化合物的每个原子都可以被其同位素替代。