Ferroelectric liquid crystal compounds containing chiral haloalkoxy tail units and compositions containing them

Abstract

Abstract Chiral, nonracemic compounds of the general formula: ##STR1## wherein m and n are either both zero, both equal one or n is equal to one and m is equal to zero, X and Y and Z are halogens, R' is an alkyl, alkoxyl, alkenyl, thioalkyl, thioether, ether, or alkylsilyl group containing three to fifteen carbon atoms, and R is an alkyl group having one to fifteen carbon atoms and where Ar is: --A.sub.a --(E).sub.e --B.sub.b --(F).sub.f --D.sub.d -- where A, B and D independently of one another are aromatic rings which are selected from the group consisting of a phenyl, a pyridine ring, a pyrimidine ring, a pyridizine ring, a pyrazine ring and a thiadiazole ring, wherein a, b and d are integers from 0-3 such that a+b+d=2-3, where E and F independently of one another are linking groups selected from the group consisting of a --CH 2 --CH 2 --, --CH 2 --O--, --CH 2 --S--, --O--CH 2 --, --S--CH 2 , --OOC-- or --COO-- wherein e and f can be 1 or 0, when e and/or f is 0, the adjacent aromatic rings are linked by a carbon-carbon single bond, preferably e and f are both 0 or one of e or f is 1, and wherein * indicates a chiral center, which are useful as ferroelectric liquid crystal components having high polarization are described.

Inventors

• 👤 Michael D. Wand
• 👤 William N. Thurmes
• 👤 David M. Walba

Bibliographic Details