| 摘要 |
The invention relates to a photographic element comprising a light sensitive silver halide emulsion layer having associated therewith (A) a cyan dye-forming coupler of formula (I) and (B) a bisphenol derivative compound of formula (II):- (A) <CHEM> wherein each R1 is an independently selected substituent provided that at least one of these is a fluoro or a perfluoroalkyl substituent; n is an integer from 1 to 3; R2 is an unsubstituted or substituted alkyl, aryl, amino or alkoxy group or a 5-10 membered heterocyclic ring which contains one or more heteroatoms selected from nitrogen, oxygen and sulfur, which ring is unsubstituted or substituted; and COG is a hydrogen atom or a group which can be split off by the reaction of the coupler with an oxidized colour developing agent. provided that (a) when n is 3 and each R1 is fluorine, COG is not a methoxy group and (b) when n is 2 and R1 in the 3- and 4- positions is each a fluorine atom, COG is not hydrogen; and (B) <CHEM> wherein R3 is an unsubstituted or substituted alkyl, aryl, alkoxy, aryloxy group or a substituted amino group; each Z independently represents the atoms necessary to complete a substituted or unsubstituted arene or heteroaromatic ring system; X is a single bond or a linking group having a single atom which connects the arene or heteroaromatic ring systems; or X forms, together with substituents ortho to X on the arene or heteroaromatic ring systems, a fused unsubstituted or substituted 5-, 6-or 7-membered ring, which may contain one or two heteroatoms selected from nitrogen, oxygen and sulfur. The fluoro substituted cyan dye-forming couplers of the invention enhance the image stability of image dye without significantly degrading other photographic properties. |
