Anisotropic organic compounds
US5888421A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1994 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Sep 19, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/3491
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
##STR1## The invention describes liquid crystalline compounds or formula (I), where A, D and G are independently selected from phenyl, thiophene, hydrogenated phenyl, chlorinated phenyl and fluorinated phenyl, B and E are independently selected from a single bond C.dbd..notident.C. C.tbd.C.C00, azoxy and diazo, k and m are independently selected from 1 and 0, such that m+n is 1 or 2, and R.sub.1 and R.sub.2 are independently selected from R, R0, alkynyl, thioalkyl, hydrogen, CN, NCS and SCN; provided that at least one of R.sub.1 and R.sub.2 is selected from CN, NCS and SCN and that at least one of A, D and G is phenyl; and excluding where at least one of R.sub.1 and R.sub.2 is independently selected as CN and one of A, D or G is not thiophene, and where m is 0, A, and D are phenyl, B is a single bond and only one of R.sub.1 or R.sub.2 is NCS. Also described are compounds suitable for inclusion in a device utilizing pretransitional characteristics of liquid crystalline materials in the isotropic phase, of general formula (II) where J and Y are independently selected from phenyl, thiophene, hydrogenated phenyl, chlorinated phenyl and fluorinated phenyl, X is selected from C.dbd..noti…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.