Fluorinated phenantrene derivatives for liquid crystal mixtures

US6168838A · kind A · utility

Assignee

• Aventis Research & Technologies GmbH & Co. · DE

Inventors

• Wolfgang Schmidt · Frankfurt, DE
• Javier Manero · Frankfurt, DE

Key dates

• Filing date: Aug 19, 1999
• Grant date: Jan 2, 2001
• Expiry date: Aug 19, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2323/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Fluorinated phenanthrene derivatives and their use in liquid-crystalline mixtures Fluorinated phenanthrene derivatives of the formula (I) ##STR1## in which G is --CHF--CH.sub.2 -- or --CF.dbd.CH--, E.sup.1, E.sup.2, E.sup.3, E.sup.4, E.sup.5 and E.sup.6 are identical or different and are PA1 --CH--, --CF-- or --N-- and R.sup.1 (--A.sup.1 --M.sup.1).sub.a (--A.sup.2 --M.sup.2).sub.b, (M.sup.3 --A.sup.3 --).sub.c (M.sup.4 --A.sup.4 --)d R.sup.2 denote mesogenic radicals are suitable as components for liquid-crystalline mixtures, especially ferroelectric mixtures.