Disclosed is a photographic element comprising a light sensitive silver halide emulsion layer having associated therewith a cyan dye forming coupler having Formula (I):
wherein
R1 and R3 independently represent hydrogen or an alkyl group;
R2 represents a carbocyclic or heterocyclic aromatic group;
n represents 1, 2, or 3;
each X is an independently selected substituent where at least one X located at a position of the phenyl ring meta or para to the sulfonyl group and is either an alkoxy group having a branched carbon or an aryloxy group; and
Z represents hydrogen or a group that can be split off by the reaction of the coupler with an oxidized color-developing compound;
provided that the substituents of the compound of formula (I) are selected so that the compound has a melting point of 160°C or less.
The element provides improved phase stability during manufacturing while exhibiting satisfactory hue and dye light stability.
本发明公开了一种摄影元素,包括具有与之关联的青色
染料形成偶合剂的光敏
银卤化物乳剂层,该偶合剂具有以下式子(I):
其中,R1和R3独立地代表氢或烷基;R2代表一个环烷或杂环芳香基团;n代表1、2或3;每个X是一个独立选择的取代基,其中至少一个X位于苯环对位或间位的磺酰基旁边,并且是一个具有分支碳的烷氧基或芳氧基;Z代表氢或可以通过偶合剂与氧化的彩色显影化合物反应而分裂的基团;偶合剂的取代基被选择为使化合物的熔点为160℃或更低。该元素在制造过程中提供了改进的相位稳定性,同时表现出令人满意的色相和
染料光稳定性。