| abstract |
The present invention relates to a compound of formula I, n n n Wherein X 1 and X 2 each independently represent -O-, -(CO)-O-, -O-(CO)-, -O-(CO)-O-, -NH-, -NY 01 - or -NH-(CO)-, preferably -O-, -(CO)-O- or -O-(CO)-, and Sp represents 1 to 20 C atoms, preferably 1 to 15 C atoms Particularly preferred are linear alkyl groups having from 1 to 10 C atoms, and cycloalkyl, cycloalkylalkyl or alkylcycloalkyl groups, wherein one or more of all such groups are -CH 2 - groups The group may be substituted by -O- such that no two O atoms are directly bonded to each other in the molecule, and R represents a linear or branched alkyl group having 1 to 10 C atoms, and a cycloalkyl group or a naphthenic group. Alkyl or alkylcycloalkyl, wherein one or more of the -CH 2 - groups of all such groups may be replaced by -O- such that no two O atoms are directly attached to each other in the molecule Preferred as a linear or branched alkyl group having 1 to 7 C atoms and particularly preferably an alkyl group having 1 to 4 C atoms, and relating to its use in a liquid crystal medium, The use of liquid crystal media in liquid crystal displays, and also in relation to this type of liquid crystal display itself. |