Chiral phenol esters of mesogenic carboxylic acids, a process for the preparation thereof and the use thereof as dopes in liquid-crystal phases

摘要

The novel esters made from a chiral compound containing 2 OH groups and a mesogenic carboxylic acid are characterized by the formula (I) <IMAGE> in which MC is a moiety of a mesogenic monocarboxylic acid after removal of one OH group. These phenol esters or phenol esters which are substituted in the aromatic moiety of the phenol radical are preferably used as dopes in twistable liquid-crystal phases, in which they effect temperature compensation and a particularly high degree of twisting.