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    • 2. 发明授权
    • Pyrimidine derivative, liquid crystal composition comprising the derivative, and liquid crystal display device fabricated by using the composition
    • 嘧啶衍生物,包含该衍生物的液晶组合物和使用该组合物制造的液晶显示装置
    • US06326065B1
    • 2001-12-04
    • US09203671
    • 1998-12-01
    • Yasuhiro HasebaShuichi MatsuiKazutoshi MiyazawaHiroyuki TakeuchiYoshitaka TomiFusayuki TakeshitaEtsuo Nakagawa
    • Yasuhiro HasebaShuichi MatsuiKazutoshi MiyazawaHiroyuki TakeuchiYoshitaka TomiFusayuki TakeshitaEtsuo Nakagawa
    • C09K1930
    • Liquid crystalline compounds having a comparatively high voltage holding ratio, high &Dgr;n and high &Dgr;&egr;, and excellent miscibility with known liquid crystalline compounds at low temperatures. The novel compounds have the formula (1) wherein R represents hydrogen atom or an alkyl group having 1 to 20 carbon atoms; n1 and n2 are independently 0, 1, or 2 provided that the sum of n1 and n2 is 1 or 2; ring A and ring B independently represent 1,4-phenylene, fluorine substituted 1,4-phenylene expressed by the formula (a) in the specification or 1,4-cyclohexylene provided that at least one of ring A and ring B is fluorine substituted 1,4-phenylene expressed by the formula (a); Za, Zb, and Zc independently represent single bond, —CH2CH2—, —COO—, —CF2O—, or —CH2CH2CH2CH2—; Q1, Q2, Q3, Q4, Q5, Q6, and Q7 independently represent hydrogen atom, a halogen atom, or methyl group provided that when at least one of Za, Zb, and Zc is —CH2CH2—, then Q2 is fluorine atom, and that when Za, Zb, and Zc are all single bonds, then Q1, Q2, Q3, Q4, Q5, Q6, and Q7 independently represent hydrogen atom or fluorine atom; Y represents hydrogen atom, a halogen atom, or a halogenated alkyl group having 1 to 5 carbon atoms; and each atom constituting this compound may be replaced by its isotope.
    • 具有比较高的电压保持率,高DELTAn和高DELTAepsi的液晶化合物,以及在低温下与已知液晶化合物的优异的混溶性。 新化合物具有式(1)其中R表示氢原子或具有1至20个碳原子的烷基; n1和n2独立地为0,1或2,条件是n1和n2的和为1或2; 环A和环B独立地表示说明书中所示的1,4-亚苯基,由式(a)表示的氟取代的1,4-亚苯基或1,4-亚环己基,条件是环A和环B中的至少一个为氟取代的 由式(a)表示的1,4-亚苯基; Za,Zb和Zc独立地表示单键,-CH2CH2-,-COO-,-CF2O-或-CH2CH2CH2CH2-; Q1,Q2,Q3,Q4,Q5,Q6和Q7独立地表示氢原子,卤素原子或甲基,条件是当Za,Zb和Zc中的至少一个是-CH 2 CH 2 - 时,则Q2是氟原子, 当Za,Zb和Zc都是单键时,Q1,Q2,Q3,Q4,Q5,Q6和Q7独立地表示氢原子或氟原子; Y表示氢原子,卤素原子或碳原子数1〜5的卤代烷基; 并且构成该化合物的每个原子可以被其同位素代替。