ADSORBED HYDRAZIDE NUCLEATING AGENTS AND PHOTOGRAPHIC ELEMENTS CONTAINING SUCH AGENTS

摘要

Novel triazole-substituted phenylhydrazide nucleating agents are disclosed as well as silver halide photographic emulsions and elements containing silver halide grains capable of forming an internal latent image having the nucleating agents adsorbed to the surface of the silver halide grains. Preferred triazole-substituted phenylhydrazides are of the formula: wherein: R is an acyl group; ? is a phenylene or substituted phenylene group; and A is a moiety comprised of a triazole nucleus capable Or promoting adsorption of hydrazide to a silver halide grain surface.