Meta-substituierte Sechsringaromaten zur Verwendung in Flüssigkristallmischungen
申请人:HOECHST AKTIENGESELLSCHAFT
公开号:EP0578054B1
公开(公告)日:1999-05-19
US5447656A
申请人:——
公开号:US5447656A
公开(公告)日:1995-09-05
Meta-substituted aromatic compounds having six-membered rings, for use
申请人:Hoechst Aktiengesellschaft
公开号:US05447656A1
公开(公告)日:1995-09-05
Meta-substituted aromatic compounds having six-membered rings, for use in liquid-crystal mixtures Compounds of the formula I ##STR1## in which X is CH, CF or N, R.sup.2 is, for example, an alkyl, ether or ester group, which may also contain a chiral center, and R.sup.1 (--A.sup.1).sub.a (--M.sup.1).sub.b (--A.sup.2).sub.c (--M.sup.2) .sub.d (--A.sub.3).sub.e (--M.sub.3).sub.f is a mesogenic radical, can advantageously be used as components of liquid-crystal mixtures, in particular ferroelectric liquid-crystal mixtures. The substances of the formula I have a particularly favorable effect on the optical switching angle and the critical pulse area of the mixtures.