SUBSTITUTED BENZENE DERIVATIVE, LIQUID-CRYSTAL COMPOSITION, AND LIQUID-CRYSTAL DISPLAY ELEMENT
申请人:CHISSO CORPORATION
公开号:EP0934919A1
公开(公告)日:1999-08-11
There is provided a liquid crystalline compound having a high voltage holding ratio which has a very small degree of temperature dependence, a low threshold voltage which has a very small degree of temperature dependence, a high Δn, and excellent miscibility with other liquid crystal materials at low temperature; a liquid crystal composition; and a liquid crystal display element, and the liquid crystalline compound is a substituted benzene derivative represented by general formula (1),
where, R represents a straight chain or branched alkyl group having 1 to 20 carbon atoms in which each of optional and nonadjacent methylene groups (-CH2-) may be substituted by an oxygen atom; X represents a halogen atom, -CF3, -CF2H, -CFH2, -OCF3 or -OCF2H; each of Z1 and Z2 independently represents -(CH2)2-, -(CH2)4-, -CH2O-, -OCH2- or a covalent bond, but Z1 and Z2 are not covalent bonds simultaneously; each of Y1, Y2, Y3, Y4, Y5, and Y6 independently represents H or F, but at least one of Y1, Y2, Y3, and Y4 represents F; and any atom constituting this compound may be substituted by an isomer thereof.
本发明提供了一种液晶化合物,该液晶化合物具有温度依赖性极小的高电压保持率、温度依赖性极小的低阈值电压、高Δn,以及在低温下与其它液晶材料极佳的混溶性;一种液晶组合物;以及一种液晶显示元件,该液晶化合物是通式(1)表示的取代苯衍生物、
其中,R 代表具有 1 至 20 个碳原子的直链或支链烷基,其中每个任选的和不相邻的亚甲基(-CH2-)可被一个氧原子取代;X 代表卤素原子、-CF3、-CF2H、-CFH2、-OCF3 或 -OCF2H;Z1和Z2各自独立地代表-(CH2)2-、-(CH2)4-、-CH2O-、-OCH2-或共价键,但Z1和Z2不能同时代表共价键;Y1、Y2、Y3、Y4、Y5和Y6各自独立地代表H或F,但Y1、Y2、Y3和Y4中至少有一个代表F;构成该化合物的任何原子都可以被其异构体取代。