申请人:CHISSO CORPORATION
公开号:EP1053996A1
公开(公告)日:2000-11-22
The present invention is to provide liquid crystalline compounds suitable for driving at a low voltage and at a wide temperature range, and are suitable for high speed response, to provide liquid crystal compositions comprising the compound, and to provide liquid crystal display devices comprising the liquid crystal composition;
the crystalline compounds are ester compounds expressed by the general formula (1)
wherein R1 represents hydrogen atom, cyano group, nitro group, amino group, a halogen atom, a straight chain or branched alkyl group having 1 to 20 carbon atoms, or a straight chain or branched alkenyl group having 2 to 20 carbon atoms; one or more hydrogen atoms in these alkyl group and alkenyl group may be replaced by halogen atoms; one or more -CH2- in these alkyl group and alkenyl group may be replaced by oxygen atoms or sulfur atoms, but there is no case where oxygen atoms are adjacent; and one or more carbon atoms in these alkyl group and alkenyl group may be replaced by silicon atoms;
A1 to A5 each independently represent 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; one or more -CH2- in the 1,4-cyclohexylene, 1-cyclohexene-1,4-diyl, and 3-cyclohexene-1,4-diyl may each independently be replaced by oxygen atoms, sulfur atoms, -CO-, -CS-, SiH2-, -NH-, -CF2-, or -CFH-, but there is no case where oxygen atoms are adjacent; hydrogen atoms which bond to carbon atoms at position 2 and position 3, respectively, in the 1-cyclohexene-1,4-diyl or 3-cyclohexene-1,4-diyl may each independently be replaced by fluorine atoms; one or more hydrogen atoms in the 1,4-phenylene may each independently be replaced by halogen atoms, halogenated alkyl groups having 1 to 3 carbon atoms, methyl groups, cyano groups, or nitro groups; and one or more -CH= in the 1,4-phenylene may each independently be replaced by nitrogen atoms;
bonding groups Za to Zd each independently represent single bond, -CH2-, -O-, -C≡C-, or an alkylene group or alkenylene group having 2 to 4 carbon atoms; one or more hydrogen atoms in these groups may be replaced by halogen atoms; and -CH2- in these groups may each independently be replaced by oxygen atom, sulfur atom, -CO-, -CS-, -NH-, -CF2-, or -CFH-, but there is no case where oxygen atoms are adjacent;
bonding group Ze represents single bond, an alkylene group or alkenylene group having 1 to 10 carbon atoms; and -CH2- in these groups may each independently be replaced by oxygen atom, sulfur atom, -CO-, -CF2-, -CFH-, -CH=CH-, -CF=CF-, -CF=CH-, or -C≡C-, but there is no case where oxygen atoms are adjacent;
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 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, one or more hydrogen atoms in these alkyl group and alkenyl group are replaced by halogen atoms; one or more -CH2- in these groups may be replaced by oxygen atoms or sulfur atoms, but there is no case where oxygen atoms are adjacent; and one or more carbon atoms in these groups may be replaced by silicon atoms;
provided that when A5 represents unsubstituted 1,4-phenylene in this compound, then Zd is single bond, and A4 is not 1,4-phenylene; and
each atom which constitutes this compound may be replaced by its isotope.
本发明旨在提供适用于在低电压和宽温度范围内驱动并适用于高速响应的液晶化合物,提供包含该化合物的液晶组合物,以及提供包含该液晶组合物的液晶显示设备;
晶体化合物是由通式(1)表示的酯化合物
其中 R1 代表氢原子、
氰基、硝基、
氨基、卤素原子、具有 1 至 20 个碳原子的直链或支链烷基或具有 2 至 20 个碳原子的直链或支链烯基;这些烷基和烯基中的一个或多个氢原子可被卤素原子取代;这些烷基和烯基中的一个或多个-
CH2-可被氧原子或
硫原子取代,但不存在氧原子相邻的情况;以及 这些烷基和烯基中的一个或多个碳原子可被
硅原子取代;
A1 至 A5 各自独立地代表 1,4-
环己烯、1,4-亚苯基、1-
环己烯-1,4-二基、3-
环己烯-1,4-二基、1-西拉-1,4-
环己烯或 4-西拉-1,4-
环己烯;1,4-
环己烯、1-
环己烯-1,4-二基和 3-
环己烯-1,4-二基中的一个或多个- -可各自独立地被氧原子、
硫原子、-CO-、-CS-、SiH2-、-NH-、-
CF2-或-CFH-取代,但不存在氧原子相邻的情况;在 1-
环己烯-1,4-二基或 3-
环己烯-1,4-二基中分别与碳原子在位置 2 和位置 3 结合的氢原子可各自独立地被
氟原子取代;1,4-亚苯基中的一个或多个氢原子可各自独立地被卤素原子、具有 1 至 3 个碳原子的卤代烷基、甲基、
氰基或硝基取代;1,4-亚苯基中的一个或多个 -CH= 可各自独立地被氮原子取代;
键合基团 Za 至 Zd 各自独立地代表单键、- -、-O-、-C≡C-、或具有 2 至 4 个碳原子的亚烷基或烯基;这些基团中的一个或多个氢原子可被卤素原子取代;这些基团中的- -可各自独立地被氧原子、
硫原子、-CO-、-CS-、-NH-、-
CF2-或-CFH-取代,但不存在氧原子相邻的情况;
键合基团 Ze 代表单键、具有 1 至 10 个碳原子的亚烷基或烯基;这些基团中的 - - 可各自独立地被氧原子、
硫原子、-CO-、-
CF2-、-CFH-、-CH=CH-、-CF=CF-、-CF=CH-或-C≡C-取代,但不存在氧原子相邻的情况;
n1 至 n3 各自独立地为 0 或 1,但 n1 ≦ n2 ≦ n3;
Y1 和 Y2 各自独立地代表氧原子或
硫原子;
R2 代表卤素原子、具有 1 至 20 个碳原子的直链或支链烷基或具有 2 至 20 个碳原子的直链或支链烯基,这些烷基和烯基中的一个或多个氢原子被卤素原子取代;这些基团中的一个或多个- -可被氧原子或
硫原子取代,但不存在氧原子相邻的情况;这些基团中的一个或多个碳原子可被
硅原子取代;
条件是当 A5 代表本化合物中未取代的 1,4-亚苯基时,则 Zd 为单键,且 A4 不是 1,4-亚苯基;以及
构成该化合物的每个原子可由其同位素取代。