Zwitterionic chromophores and polymers containing such chromophores
US6894169B1 · kind B1 · utility
8Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2002 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Nov 5, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B23/145
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A non-linear chromophore is obtained by reacting a picolinium halide having a desired functional group (preferably —OH) with a lithium TCNQ adduct. If desired, the chromophore can be graft polymerized onto a polymer which has complementary functional groups (preferably carboxyl groups). Optionally the polymer can then be cross-linked. Such polymers are useable in electro-optical devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.