Azine liquid crystal compounds for use in light-control devices
    53.
    发明授权
    Azine liquid crystal compounds for use in light-control devices 失效
    用于光控制装置的Azine液晶化合物

    公开(公告)号:US4265784A

    公开(公告)日:1981-05-05

    申请号:US61376

    申请日:1979-07-27

    CPC分类号: C07C251/88 C09K19/24

    摘要: A light-control device includes a liquid crystal material sandwiched between a pair of planar, light-transmitting members. The liquid crystal material particularly includes an asymmetrical azine compound having the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are different para-substituents selected from the group comprising cyano, halogen, alkyl, and substituted alkyl radicals in which the alkyl radical has from one to nine carbon atoms, and wherein X and Y are selected from the group comprising hydrogen and methyl radicals.

    摘要翻译: 光控制装置包括夹在一对平面透光构件之间的液晶材料。 液晶材料特别包括具有以下通式的不对称吖嗪化合物:其中R 1和R 2是选自氰基,卤素,烷基和取代的烷基的不同对位取代基,其中烷基具有一个 至9个碳原子,并且其中X和Y选自氢和甲基。

    4-(Alkyl)-4{40 -(alkoxy or alkylcarbonyloxy)-1,1{40 -azobene
    54.
    发明授权
    4-(Alkyl)-4{40 -(alkoxy or alkylcarbonyloxy)-1,1{40 -azobene 失效
    4-(烷基)-4 {40-(烷氧基或烷基羰氧基)-1,1 {40-氮杂

    公开(公告)号:US3893994A

    公开(公告)日:1975-07-08

    申请号:US38325373

    申请日:1973-07-27

    申请人: MERCK PATENT GMBH

    摘要: Azo compounds of the formula

    WHEREIN X is azo, R is straight-chain alkyl of 3 - 8 carbon atoms, and R'' is straight-chain alkyl of straight-chain alkanoyl, each of 1 - 10 carbon atoms, in pure form and mixtures thereof with each other and with other nematic or non-nematic compounds, have nematic liquid-crystalline phases at low temperatures and exhibit wide nematic mesophases. In their nematic phase, their light scattering property varies proportionately and reversably to the voltage applied thereto, which renders them useful in the production of display screens, in nuclear resonance and electron resonance spectroscopy and as solvents for stereospecific chemical reactions.

    摘要翻译: 式WHEREIN X为偶氮的偶氮化合物,R为3-8个碳原子的直链烷基,R'为直链烷酰基的直链烷基,每个为1-10个碳原子,为纯形式和混合物 并且与其它向列相或非向列化合物相比,在低温下具有向列型液晶相并显示出宽的向列型中间相。 在其向列相中,它们的光散射特性成比例地和可逆地变化到施加到其上的电压,这使得它们可用于制备显示屏,核共振和电子共振光谱学以及作为用于立体特异性化学反应的溶剂。