Compounds of liquid crystalline medium and use thereof for high-frequency components

摘要

The present invention relates to compounds of the formula I;
to the use thereof for high-frequency components, to liquid-crystalline media comprising the compounds, and to high-frequency components, in particular antennae, especially for the gigahertz range, comprising these media. The liquid-crystalline media serve, for example, for the phase shifting of microwaves for tuneable “phased-array” antennae.

主权项

1. A compound of the formula Iin which
R1 denotes branched or unbranched alkyl having 1 to 15 C atoms or branched or unbranched alkenyl having 2 to 15 C atoms, where, in addition, one or more non-adjacent —CH2— groups in these radicals may be replaced by —O— and/or one or more H atoms may be replaced by halogen atoms, L11 is branched or unbranched alkyl having 1 to 12 C atoms, branched or unbranched alkenyl or alkynyl having 2 to 12 C atoms, where, in addition, one or more non-adjacent —CH2— groups in these radicals may be replaced by —O—, or denote substituted or unsubstituted cycloalkyl, cycloalkenyl, substituted or unsubstituted phenyl, substituted or unsubstituted arylethynyl,  and  on each occurrence, independently of one another, denote
an aromatic or heteroaromatic ring system, in which, in addition, one or two CH groups may be replaced by N, and where the ring systems are optionally substituted by the substituents L11,or denote a cycloaliphatic ring system, in which, in addition, one or two non-adjacent —CH2— groups may be replaced by —O— and/or —S—,or denote 1,4-cyclohexenylene or 1,4-bicyclooctylene, Zll on each occurrence, independently of one another, denotes a single bond, —C≡C—, —CF═CF—, —CH═CH—, —OCF2—, —CH2—CH2— or —OCH2—, n denotes an integer in the range from 0 to 3.