Dyes suitable for sensitization of photoconductive systems
US4943638A · kind A · utility
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2References
4Claims
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Key dates
| Filing date | Jul 24, 1989 |
| Grant date | Jul 24, 1990 |
| Priority date | — |
| Expiry date | Jul 24, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G5/067
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Cyanine dyes, particularly indocyanine dyes, having at least 7 carbon atoms in the polymethine chain which may possess a fused cyclopentene or cyclohexene ring in the form of a tri-iodide salt exhibit a substantial reduction in the propensity to associate compared to dyes having the identical cation but different anion. The tri-iodide salts are particularly useful as sensitizers in organic photoconductor systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.