Silver halide photographic elements containing bis Au(I) sensitizers
US6686143B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2002 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Aug 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention relates to a photographic element comprising a support and a silver halide emulsion layer, the emulsion layer comprising a water soluble Au(I) complex having the formula[L—Au—L]n−M+nwherein the complex is symmetrical; L is an organothiosulfonato ligand which is an antifogging, stabilizing, or sensitizing compound, n is 1 to 4, and M is a cationic counterion. This invention further relates to a silver halide photographic element comprising a support and a silver halide emulsion layer, the emulsion layer comprising an organothiosulfonato Au(I) complex having the formula[A—SO2S—Au—SSO2—A]n−M+nwhereinM is a cationic counterion;A is a substituted or unsubstituted organic group;and n is 1 to 4; and wherein the compound is symmetrical.It further relates to a method of preparing a silver halide emulsion utilizing said organothiosulfonato Au(I) complexes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.