Photographic element containing new gold(I) compounds
AssigneeEastman Kodak Company
InventorsRoger Lok, Weimar Weatherly White
Life of this patent
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Abstract
A photographic element is provided comprising a support having situated thereon a silver halide emulsion layer, the emulsion layer comprising a compound of the formula: Z--SO.sub.2 S--Au(I)--L (I) wherein Z represents an alkyl, aryl, or heterocyclic group; and L represents a thioether, selenoether or telluroether containing ligand.
Claims20
A photographic element comprising a support having situated thereon a silver halide emulsion layer, said emulsion layer comprising a compound of the formula:
- Z--SO.sub.2 S--Au(I)--L (I)
- wherein
- Z represents an alkyl, aryl, or heterocyclic group;
- and
- L represents a thioether, selenoether or telluroether containing ligand.
A photographic element comprising a support having situated thereon a silver halide emulsion layer, said emulsion layer having been chemically sensitized in the presence of a compound of the formula:
- Z--SO.sub.2 S--Au(I)--L (I)
- wherein
- Z represents an alkyl, aryl, or heterocyclic group;
- and
- L represents a thioether, selenoether or telluroether ligand.
A method of forming a silver halide emulsion comprising precipitating silver halide grains in an aqueous colloidal medium, washing the grains, and sensitizing the grains by adding dyes, chemical sensitizers, and heating, and adding to the emulsion, prior to or during heating, a compound of the formula:
- Z--SO.sub.2 S--Au(I)--L (I)
- wherein
- Z represents an alkyl, aryl, or heterocyclic group;
- and
- L represents a thioether, selenoether or telluroether ligand.
A photographic silver halide emulsion prepared by precipitating silver halide grains in a first aqueous colloidal medium, washing the grains, sensitizing the grains by adding dyes, chemical sensitizers and heating, and adding to the emulsion, prior to heating, a dispersion prepared by combining a thiosulfonate compound with potassium tetrachloraurate and a thioether, selenoether, or telluroether compound in a second aqueous colloidal medium.
A compound of the formula
- Z--SO.sub.2 S--Au(I)--L (I)
- wherein
- Z represents an alkyl, aryl, or heterocyclic group;
- and
- L represents a thioether, selenoether or telluroether ligand.
Dependencies are inferred from the claim text.