SUBSTITUTED AMINO ALCOHOLS AS CHIRAL DOPANTS

摘要

The invention relates to the use of a substituted, chiral amino alcohol, comprising one or more structural units of the following formula (1), wherein the abbreviations A, Y, R1 and R3 to R5 have the following meanings: is a covalent bond or a hydrocarbon group, Y is a covalent bond or a hydrocarbon group that can have an oxygen atom at one of its ends through which it is bonded to R1, R1 is an aliphatic or heterocyclic or aromatic radical, the carbon chain of which may be interrupted by one or more B groups, R5 is selected from the group consisting of (a) aliphatic radicals, wherein individual carbon atoms may be replaced by oxygen atoms or carbonyl groups, and wherein the carbon chains of same radicals may be optionally interrupted by a B group, and (b) araliphatic, cycloaliphatic, aromatic and heterocyclic radicals, wherein the carbon chain can be interrupted by one or more B structural elements and/or by one or more D coupling groups, R3, R4 are hydrogen or aliphatic or araliphatic substituents, which are independent of one another, wherein the carbon chain can be interrupted by one or more B groups, B is selected from polymerizable or crosslinkable structural elements from the group comprising C1-C16-alkenyl, C1-C16-alkenyloxy, —C═C—, —CH═CH—COO—, —CH═CH—, —CX═CH—COO— with X═C1-C16-alkyl, and the trans-form of —OOC—CH═CH—COO—, and D is selected from —O—, —NH—, —N(CH3)—, —N(C2H5)—, —SO2—, —CO—, —COO—, —CH═CH—, —OCOO—, —OCH2—, CH═N, —CF2CF2—, as a chiral dopant in liquid crystal (mixtures), e.g., in electro-optical systems.

主权项

1. A liquid crystal or liquid crystal mixture, comprising one or more chiral dopants, selected under substituted, chiral amino alcohols comprising one or more structural units of the following formula (1)in which the abbreviations A, Y and R1 and R3 to R5 have the following meanings:
A is a covalent bond or a saturated or unsaturated, straight-chain, branched or ring-containing hydrocarbon group, Y is a covalent bond or a saturated or unsaturated, straight-chain, branched or ring-containing hydrocarbon group, which may have an oxygen atom on one of its ends, through which it is connected to R1, R1 is a saturated or unsaturated, straight-chain or branched or ring-containing aliphatic group or a heterocyclic or aromatic group, which in all cases may be substituted or unsubstituted and/or the carbon chain of which can be interrupted by one or more groups B, R5 is selected from the group consisting of
(a) saturated and unsaturated, straight-chain and branched, substituted and unsubstituted aliphatic radicals, wherein individual C atoms may be replaced or substituted by oxygen atoms or carbonyl groups, wherein the carbon chains of these radicals may optionally be interrupted by a group B, and(b) araliphatic, cycloaliphatic, aromatic and heterocyclic, unsubstituted or substituted radicals, the carbon chains of which may be interrupted by one or more groups B and/or by one or more groups D, R3, R4 each independently represents hydrogen or an unsubstituted or substituted, straight-chain or branched or ring-containing aliphatic or an unsubstituted or substituted araliphatic substituent, the carbon chain of which may be interrupted by one or more groups B, B is selected from among polymerizable or cross-linkable structural elements of the group composed of C1-C16-alkenyl, C1-C16-alkenyloxy, —C≡C—, —CH═CH—COO—, —CH═CH‘3, —CX═CH—COO— with X═C1-C16-alkyl and the trans-form of —OOC—CH═CH—COO—. D is selected from —O—, —NH—, —N(CH3)—, —N(C2H5)—, —SO2—, —CO—, —COO—, —CH═CH—, —OCOO—, —OCH2—, CH═N, —CF2CF2—.