| 摘要 |
A photographic element exhibiting improved yellow dye stability comprises a light sensitive silver halide emulsion layer having associated therewith a yellow dye forming coupler having the formula: wherein: R1 and R2 in the formula are independently selected alkyl, aryl, amino or heterocyclic groups, each free of hydrogen bonded to the atom linking the group to the rest of the coupler; R3 is a H or a substituent; X is C, S, or P, and n is 1 or 2; each Z is an independently selected substituent group substitutable to a phenyl ring provided that at least one such group is an electron withdrawing group and s is 1 to 3; each Y is an independently selected substituent group and r is 1 to 3.
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