Optically active silacyclohexane compounds, liquid crystal compositions
comprising the same and liquid crystal display devices comprising the
compositions
    3.
    发明授权
    Optically active silacyclohexane compounds, liquid crystal compositions comprising the same and liquid crystal display devices comprising the compositions 失效
    光活性硅环己烷化合物,包括该组合物的液晶组合物和包含该组合物的液晶显示装置

    公开(公告)号:US5730902A

    公开(公告)日:1998-03-24

    申请号:US700970

    申请日:1996-08-21

    摘要: An optically active silacyclohexane compound of the formula (I) ##STR1## wherein R represents an organic residue, X represents --CH.sub.2 -- or --O--; Z represents a chiral group having at least one chiral carbon atom; L.sub.1 and L.sub.2 independently represent H or F, n is 0 or 1; ##STR2## represents a trans-1-sila-1,4-cyclohexylene group or trans-4-sila-1,4-cyclohexylene group whose silicon atom at the 1 or 4 position has H, F, Cl or CH.sub.3, or a 1,4-cyclohexylene group; and ##STR3## represents a trans-1-sila-1,4-cyclohexylene group or trans-4-sila-1,4-cyclohexylene group whose silicon atom at the 1 or 4 position has H, F, Cl or CH.sub.3, a 1,4-cyclohexylene group or a 1,4-phenylene group provided that at least one of ##STR4## represents the trans-1-sila-1,4-cyclohexylene group or trans-4-sila-1,4-cyclohexylene group defined above. A liquid crystal composition comprising the compound defined above and a liquid crystal display device comprising the composition are also described.

    摘要翻译: 式(I)的光学活性硅环己烷化合物其中R表示有机残基,X表示-CH 2 - 或-O-; Z表示具有至少一个手性碳原子的手性基团; L1和L2独立地表示H或F,n为0或1; 表示1或4位的硅原子具有H,F,Cl或CH 3的反式-1-硅烷-1,4-亚环己基或反式-4-硅烷-1,4-亚环己基,或 1,4-亚环己基; 代表1或4位的硅原子具有H,F,Cl或CH 3的反式-1-硅烷-1,4-亚环己基或反式-4-硅烷-1,4-亚环己基,a, 1,4-亚环己基或1,4-亚苯基,条件是中的至少一个表示反式-1-硅烷-1,4-亚环己基或反式-4-硅烷-1,4-亚环己基 以上定义。 还描述了包含上述定义的化合物的液晶组合物和包含该组合物的液晶显示装置。

    Silacyclohexane compound, a method of preparing it and a liquid crystal
composition containing it
    5.
    发明授权
    Silacyclohexane compound, a method of preparing it and a liquid crystal composition containing it 失效
    硅环己烷化合物,其制备方法和含有它的液晶组合物

    公开(公告)号:US5578244A

    公开(公告)日:1996-11-26

    申请号:US415858

    申请日:1995-04-03

    摘要: A silacyclohexane compound represented by the following general formula (I) ##STR1## wherein R denotes a linear-chain alkyl group with a carbon number of 1-10, a fluoroalkyl group with a carbon number of 1-10 in which a fluorine atom(s) is substituted for one or two hydrogen atoms, a branched-chain alkyl group with a carbon number of 3-8, an alkoxyalkyl group with a carbon number of 2-7, or an alkenyl group with a carbon number of 2-8. ##STR2## denotes a trans-1-sila-1,4-cyclohexylene or trans-4-sila-1,4-cyclohexylene group whose silicon at position 1 or position 4 has a substitutional group(s) of H, F, Cl or CH.sub.3. L.sub.1 and L.sub.2 independently denote H or F. L.sub.3 and L.sub.4 independently denote H, F or Cl. X denotes a H, CN, F, Cl, CF.sub.3, CF.sub.2 Cl, CHFCl, OCF.sub.3, OCF.sub.2 Cl, OCHFCl, OCHF.sub.2, or a linear-chain alkyl or alkoxy group with a carbon number of 1-10. i, j and k respectively denote 0 or 1, where (i+j+k) is 0 or 1. n denotes 0, 1 or 2.

    摘要翻译: 由以下通式(I)表示的硅环己烷化合物其中R表示碳数为1-10的直链烷基,碳数为1-10的氟代烷基,其中a 氟原子取代一个或两个氢原子,碳数为3-8的支链烷基,碳数为2-7的烷氧基烷基或碳数为 2-8。 表示1位或4位的硅具有H,F,Cl取代基的反式-1-硅烷-1,4-亚环己基或反式-4-硅烷-1,4-亚环己基 或CH3。 L1和L2独立地表示H或F.L3和L4独立地表示H,F或Cl。 X表示H,CN,F,Cl,CF 3,CF 2 Cl,CHFCl,OCF 3,OCF 2 Cl,OCHFCl,OCHF 2或碳数为1-10的直链烷基或烷氧基。 i,j和k分别表示0或1,其中(i + j + k)为0或1.n表示0,1或2。

    Process for preparing silacyclohexane compounds
    9.
    发明授权
    Process for preparing silacyclohexane compounds 失效
    硅环己烷化合物的制备方法

    公开(公告)号:US5560866A

    公开(公告)日:1996-10-01

    申请号:US491141

    申请日:1995-06-16

    CPC分类号: C09K19/406 C07F7/083

    摘要: A process for preparing a silacyclohexane compound of the general formula ##STR1## wherein R and Q are, respectively, defined substituents, which process comprising the steps of converting a compound of the following formula ##STR2## to a halosilacyclohexane of the following formula ##STR3## wherein X is a halogen, reacting the halosilacyclohexane with an alcohol to obtain an alkoxysilacyclohexane of the formula which is equilibrated in steric configuration, and ##STR4## reducing the equilibrated alkoxysilacyclohexane whereby a trans form silacyclohexane compound is predominantly produced.

    摘要翻译: 制备通式为“IMAGE”的硅环己烷化合物的方法,其中R和Q分别为限定的取代基,该方法包括以下步骤:将下式的化合物转化为下式的卤代环己烷:IMA IMA >其中X是卤素,使卤代二环己烷与醇反应,得到在空间结构中平衡的式的烷氧基硅烷环己烷,并且还原平衡的烷氧基硅烷环己烷,由此主要生产反式形式的硅环己烷化合物。

    Liquid crystal compositions comprising silacyclohexane compounds
    10.
    发明授权
    Liquid crystal compositions comprising silacyclohexane compounds 失效
    包含硅环己烷化合物的液晶组合物

    公开(公告)号:US5951913A

    公开(公告)日:1999-09-14

    申请号:US856710

    申请日:1997-05-15

    IPC分类号: C09K19/40 C09K19/34 C09K19/12

    CPC分类号: C09K19/406

    摘要: A liquid crystal composition having a liquid crystal component with a chemical structure of two saturated rings connected directly to one another, and an additional structural isomer thereof having a silane atom in a different position from the first component and having the structure set forth in formula (1) hereinbelow. ##STR1## This composition provides an improved effect with respect to enhancement in both response speed and T.sub.NI (nematic-isotropic transition temperature) as a high voltage hold ratio as required for TFT driving in addition to also lowering the voltage.

    摘要翻译: 一种具有两个饱和环的化学结构的液晶组分的液晶组合物,其两个直接相互连接,并且其另外的结构异构体具有与第一组分不同位置的硅烷原子并且具有式( 1)。 除了降低电压之外,该组合物还提供了作为TFT驱动所需的高电压保持率的响应速度和TNI(向列 - 各向同性转变温度)的增强效果。