Eastman-kodak Company

Weimar W White

Roger L Lok

Brian P Cleary

Gary G Kiehl

Melanie W Marshall

Benjamin T Chen

Alton L Chitty

E Steven Brandt

Laurie A Kimble

Bis AU(I) sensitizers and their synthesis

Silver halide photographic elements containing bis Au(I) sensitizers

Stable and water soluble bis Au(I) complexes and their synthesis

A method of screening a water soluble gold complex for use as a sensitizer in a silver halide photographic element comprised of experimentally measuring the electrochemical potential of the gold complex and then determining if the electrochemical potential falls within a predetermined utility window.

Method for screening chemical sensitizers

Conversion of impure silver halide to ultra-pure silver metal

Preparation of ultra-pure silver metal

The invention relates to a method of forming a silver halide emulsion comprising adding triiodide during grain formation or sensitization.

Preparation of silver chloride emulsions having iodide containing grains

This invention relates to an organomercapto Au(I) complex having the formula ##STR1## wherein M is a cationic counterion;

This invention relates to a silver halide photographic element comprising a support and a silver halide emulsion layer, the emulsion layer comprising an organomercapto Au(I) complex having the formula

Photographic element containing water soluble bis Au(I) complexes

This invention relates to a silver halide photographic element comprising a support and a silver halide emulsion layer, the emulsion layer comprising a Au(I) compound having the formula wherein Z is a substituted or unsubstituted alkyl, aryl, alkylaryl, or heterocyclic group; and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently substituted or unsubstituted alkyl, aryl, alkylaryl, or heterocyclic groups, or one or both of R.sub.1 and R.sub.2 or R.sub.3 and R.sub.4, may independently combine to form a nitrogen containing ring with the nitrogen to which they are attached.

Au(I) sensitizers for silver halide emulsions

A photographic element comprising a support having situated thereon a silver halide emulsion layer, said emulsion layer comprising a compound of the formula:

This invention relates to a silver halide photographic element comprising a support and a silver halide emulsion layer, the emulsion layer comprising a Au(I) compound having the formula ##STR1## wherein Z is a substituted or unsubstituted alkyl, aryl, alkylaryl, or heterocyclic group; and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently substituted or unsubstituted alkyl, aryl, alkylaryl, or heterocyclic groups, or one or both of R.sub.1 and R.sub.2 or R.sub.3 and R.sub.4, may independently combine to form a nitrogen containing ring with the nitrogen to which they are attached.

Gold(I) sensitizers for silver halide emulsions

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:

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Canaseraga, NY, United States of America

Weimar W White