摘要:
The invention relates to liquid-crystalline compounds of the formula I in which R1, R2, A1, A2, A3, A4, Z1, Z2, a, b and c are as defined in claim 1, and to liquid-crystalline media comprising at least compound of the formula I and to electro-optical displays containing a liquid-crystalline medium of this type.
摘要:
Disclosed is a tetracyclic compound of the formula I in which R1, R2 are each, independently of one another, an alkyl or alkenyl radical having up to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3, or monosubstituted by halogen. One or more CH2 groups in these radicals may also, in each case independently of one another be replaced by —O—, —S—, —CO—, —CO—O—, —O—CO— or —O—CO—O— such that the O atoms are not linked directly to one another. Z is —OCF2—, —CF2O— or a single bond. L1, L2, L3, and L4 are each, independently of one another, H or F. m is 1 or 2. Similar compounds, as well as liquid-crystalline media having these compounds, are also disclosed.
摘要:
The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I in which R1 and R2 are as defined herein.
摘要:
The invention relates to novel dioxane derivatives of the formula I R1—(A1—Z1)m—A2—C2F4—A3—(Z2—A4)n—R2 I in which R1, R2, A1, A2, A3, A4, Z1, Z2, m and n are as defined herein, to their use as components of liquid-crystalline media, and to liquid-crystal and electro-optical display elements which contain the liquid-crystalline media according to the invention.
摘要:
The invention relates to CF2O-bridged cyclohexane derivatives, in particular compounds of formula (I), R1-(-A1-Z1-)k1-Q-CF2O-A2-(-Z3-A3-)K3-R2, wherein Q represents group (a); W1, W2 represent —CH2— and/or —O— independendy from each other, X1, X2, X3, X4 represent H, F, —CH3—CH2F—CH2F and/or —CF3 independently from each other, provided that at least one substituent X1, X2, X3 and/or X4 does not represent H, Z2 represents a simple bond, —CH2—CH2— or —CF2—CF2—, m represents 0 or 1 and R1, R2, A1, A2, A3, Z1, Z3, k1 and k3 have the meaning cited in the description. The invention further relates to liquid crystal substances such as optical and electro-optical display elements.
摘要:
The invention relates to liquid crystal compounds of formula (I), where X1, X2, X3, Z1, Z2, L1, L2, L3, L4, L5, L6, L7, L8, L9, L10, L11 and a have the meanings given in claim 1, and liquid crystal media containing at least one compound of formula (I) and electro-optical displays comprising such a liquid crystal medium
摘要:
The invention relates to liquid-crystalline compounds of the formula I in which R1, A1, A2, Z1, Z2, a, b, L1, L2 and L3 are as defined in claim 1, and to liquid-crystalline media comprising at least compound of the formula I and to electro-optical displays containing a liquid-crystalline medium of this type.
摘要:
The invention relates to cyclohexane derivatives of the formula I in which n, m, p, R.sup.1, X.sup.1, X.sup.2, X.sup.3, Z.sup.1, Z.sup.2, Z.sup.3, A.sup.1, A.sup.2 and Y are as defined herein.
摘要:
The invention relates to fluorocyclohexane derivatives of the formula I ##STR1## in which R.sup.1, Z.sup.1, Z.sup.2, L.sup.1, L.sup.2, L.sup.3 and X are as defined as below:X is alkyl or alkoxy having 1 to 10 carbon atoms which is unsubstituted or substituted by halogen, alkenyl or alkenyloxy having 2 to 10 carbon atoms which is unsubstituted or substituted by --CN, --CF.sub.3 or --F, or is --CN, --F, --OCHF.sub.2, --OCF.sub.3, --OCHFCF.sub.3 or --OCF.sub.2 CF.sub.3,L.sup.1, L.sup.2 and L.sup.3 are each, independently of one another, H or F,R.sup.1 is H, an alkyl or alkenyl radical having 1-12 carbon atoms which is unsubstituted, monosubstituted by CN or CF.sub.3 or substituted by halogen, where one or more non-adjacent CH.sub.2 groups in these radicals may also, in each case independently of one another, be replaced by --O--, --S--, --CO--, --.diamond.--, --CO--O--, --O--CO-- or --O--CO--O--,Z.sup.1 and Z.sup.2 are each, independently of one another, --CO--O--, --O--CO--, --CH.sub.2 O--, --O--, --O--CH.sub.2 --, --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C-- or a single bond,with the proviso that compounds of the formula I in which L.sup.1 is H and Z.sup.2 is simultaneously a single bond are excluded.
摘要:
The invention relates to chiral compounds of formula I wherein X1, X2, X1, X2, x1, x2, y1, y2, B, C, U1, U2, V1, V2, W1 and W2 have the meaning given in claim 1, to liquid crystal mixtures comprising at least one chiral compound of formula I, to chiral linear or crosslinked liquid crystal polymers obtainable by polymerizing a polymerizable mixture comprising at least one chiral compound of formula I, to the use of chiral compound of formula I and mixtures and polymers obtained thereof in liquid crystal displays, active and passive optical elements, adhesives, synthetic resins with anisotropic mechanical properties, cosmetic and pharmaceutical compositions, diagnostics, liquid crystal pigments, for decorative and security applications, nonlinear optics, optical information storage or as chiral dopants, and to a liquid crystal display comprising a mixture comprising at least one chiral compound of formula I.