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    Ferroelectric liq. crystal mixts. - contain at least 2 components, at least one of which is a complex ligand for ions, esp. cations
    22.
    发明专利
    Ferroelectric liq. crystal mixts. - contain at least 2 components, at least one of which is a complex ligand for ions, esp. cations 未知

    公开(公告)号：DE4011803A1

    公开(公告)日：1991-10-17

    申请号：DE4011803

    申请日：1990-04-12

    Applicant: HOECHST AG

    Inventor： ESCHER CLAUS DR ,  HARADA TAKAMASA ,  ROESCH NORBERT DR ,  WINGEN RAINER DR

    IPC: C09K19/52 ,  C09K19/02 ,  C09K19/54 ,  C09K19/58 ,  G02F1/13

    Abstract: Ferroelectric liq. crystal mixts. (I) are claimed, consisting of at least 2 components, at least one of which is a complex ligand for ions (II). More specifically (II) are complex ligands for cations, pref. electrically neutral cpds. which complex cations and contain at least 2 N- and/or O- and/or P-donor centres; (II) are medium- or macro-cyclic cpds., namely cryptands, coronands, podands, bicyclic cpds. with at least 2 N atoms, or bicyclic or tricyclic cpds., pref. with at least 2 N atoms and at least 4 C atoms; (I) contains at least 2 different ligands (II), pref. at least one ligand for alkali and/or alkaline earth ions, esp. pref. at least 2 different complex ligands for different cations; (II) is a cpd. of formula (III) or (IV). In the formulae Z = O or S; m, n = integers above 0; m + n = 2-6; X1, X2 = Z, NR, -Z-(o-phenylene)-Z-, -Z-(1,2-cyclohexylene)-Z-, or X1 and X2 together = =N-CH2(CH2-Z-CH2)1-CH2-N=, =N-CO(CH2-Z-CH2)1-CO-N= or =CH-CH2(CH2ZCH2)2-CH2-CH= (with R = 1-15C alkyl or alkoxy, Ph, benzyl or -COPh; l = 1 or 2); R1-R4 = H, 1-12C alkyl, p-tolyl, Ph, -CH2-(p-phenylene)-COOH or benzyl; p, q, r, s = 2-4; p + q + r + s = 8-16; (I) contain 0.01-10 mol.% (II) and have spontaneous polarisation at least 35 nC/cm2.

    29.
    发明专利
    未知

    公开(公告)号：FI911720A0

    公开(公告)日：1991-04-10

    申请号：FI911720

    申请日：1991-04-10

    Applicant: HOECHST AG

    Inventor： HARADA TAKAMASA ,  ROESCH NORBERT ,  WEGENER PETER

    IPC: C09K19/06 ,  C09K19/30 ,  C09K19/32 ,  C09K19/34 ,  C09K19/40 ,  C09K19/54 ,  C09K19/56 ,  C09K19/58 ,  G02F1/13 ,  G02F1/137 ,  C09K

    Abstract: A liquid-crystal mixture comprising at least two components and containing, as one component, a macrocyclic compound of the formula (1) … … where a, b, c, d, e and f, independently of one another, are an integer from zero to 4, where a+b+c+d+e+f is >/= 7, and -A-, -B-, -C-, -D-, -E- and -F- are identical or different and are, for example, -CH2-, -CH=CH-, -CO- or -COO-,… results, in FLC displays, in the formation of uniform alignment and in the avoidance of twist states, which is expressed in significantly improved contrast.

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