Liquid crystal compounds having ether tail moiety
    46.
    发明授权
    Liquid crystal compounds having ether tail moiety 失效
    具有醚尾部分的液晶化合物

    公开(公告)号:US5132041A

    公开(公告)日:1992-07-21

    申请号:US61072

    申请日:1987-06-23

    摘要: Disclosed are smetic liquid crystal compounds exhibiting ferroelectric behavior and having the formulaR.sup.1 --OR.sup.2).sub.a O--R.sup.3).sub.b Z--R*wherein R.sup.1 is alkyl or alkoxyalkyl, R.sup.2 and R.sup.3 are each alkylene, a is an integer of at least one, b is zero or one, R* is an optically active group containing an asymmetric center and --Z-- is an organic divalent core radical having parallel or coaxially extending bonds at the terminal ends thereof, the core radical having an axial ratio of at least two and being characterized by an essentially rigid and flat molecular structure. Presence of the ether-interrupted hydrocarbon tail moiety at the terminal end of the compounds provides a lowering in observed temperatures of phase transition.

    摘要翻译: 公开了具有铁电性能并且具有式R1-OR2)的芳族液晶化合物,其中R1是烷基或烷氧基烷基,R2和R3各自是亚烷基,a是至少一个的整数,b是 0或1,R *是含有不对称中心的光学活性基团,-Z-是在其末端具有平行或同轴延伸的键的有机二价核心基团,所述核心基团具有至少两个的轴比,并且为 其特征在于基本上刚性和平坦的分子结构。 在化合物末端存在醚中断的烃尾部分提供观察到的相变温度的降低。