Color photographic element containing a coupler releasing derivative with at least three heteroatoms with specific hydrophobicity

摘要

Disclosed is a color photographic element comprising at least one light sensitive silver halide emulsion layer having associated therewith a coupler according to Formula I:wherein:COUP is an organic fragment which reacts with oxidized developer to release-(TIME)n-HSM,TIME is an optional timing group or linking group which connects HSM to COUP at the site of reaction with oxidized developer,n=0,1 or 2, andHSM is a compound having a minimum of three heteroatoms and having a ClogP sufficient to increase the speed of said element compared to the same element without the coupler.The invention provides improved light sensitivity without significant adverse effect on granularity or ease of manufacture.