Phenyldioxane derivatives, liquid crystal compositions, and liquid crystal display elements
申请人:Chisso Corporation
公开号:EP0819685A1
公开(公告)日:1998-01-21
There is provided an electrically and chemically stable liquid crystalline compound which exhibits a significantly large value of De and a high voltage holding ratio. The compound is a phenyldioxane derivative represented by formula (1):
wherein R represents a C1-C20 alkyl group; each of n1 and n2 represents 0 or 1; each of Q1 through Q6 represents a hydrogen atom, a fluorine atom, or a chlorine atom, provided that Q3 is a fluorine atom or a chlorine atom when n2 is 0, and that at least one of Q1 and Q3 is a fluorine atom or a chlorine atom when n2 is 1; each of Za and Zb represents a single bond, -COO-, or -CF2O-; Zc represents a single bond or -CH2CH2-; Y represents a hydrogen atom, a halogen atom, or a C1-C5 halogenated alkyl group in which one or more non-adjacent methylene groups may be replaced by oxygen atoms or sulfur atoms; and each of the elements that constitute the compound may comprise isotopes of the element. The compound also exhibits excellent compatibility with previously known liquid crystalline compounds, and is advantageously used for low voltage driving of liquid crystal displays for TFTs. There are also provided liquid crystal compositions comprising the compound, as well as liquid crystal display elements constructed of the compositions.
提供了一种电学和化学稳定的液晶化合物,其具有显着大的De值和高的耐压比。该化合物是一种由式(1)表示的苯二氧杂环丙烷衍生物:其中R代表一个C1-C20烷基基团;n1和n2中的每一个代表0或1;Q1至Q6中的每一个代表氢原子、氟原子或氯原子,条件是当n2为0时,Q3是氟原子或氯原子,当n2为1时,Q1和Q3中至少一个是氟原子或氯原子;Za和Zb中的每一个代表单键,-COO-或-CF2O-;Zc代表单键或-CH2CH2-;Y代表氢原子、卤素原子或一个C1-C5卤代烷基基团,其中一个或多个非相邻亚甲基基团可被氧原子或硫原子替代;构成该化合物的每个元素可能包括该元素的同位素。该化合物还表现出与先前已知的液晶化合物具有良好的兼容性,并且可优势用于TFT液晶显示器的低电压驱动。还提供了包含该化合物的液晶组合物,以及由这些组合物构建的液晶显示元件。