Ferroelectric liquid crystal compounds containing chiral haloalkoxy tail units and compositions containing them
US5380460A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1991 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | Sep 20, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/588
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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: EQU --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.sub.2 --CH.sub.2 --, --CH.sub.2 --O--, --CH.sub.2 --S--, --O--CH.sub.2 --, --S--CH.sub.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 li…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.