Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a phenolic “NB magenta coupler” having the formula:
wherein:
the term “NB magenta coupler” represents a coupler of formula (I) that forms a magenta dye with the developer 4-amino-3-methyl-N-ethyl-N-(2-methanesulfonamidoethyl) aniline sesquisulfate hydrate for which the maximum absorption of the dye upon spin coating is in the range of from 520 to 590 nm and the left bandwidth (LBW) or the right bandwidth (RBW) using spin-coating, is at least 5 nm less than that of the same dye in solution form;
R1 is a heterocyclic, carbocyclic, or alkenyl group with substituents of sufficient electron withdrawing capacity to obtain a spin-coated dye as described in the preceding subparagraph that exhibits a maximum absorption in the range of 520-590 nm;
Y is H or a coupling-off group;
each Z* is an independently selected substituent group where p is independently 0 to 2;
R2 is a heterocyclic or carbocyclic ring group, or an alkyl group;
provided that when R2 is an alkyl group with an &agr;-alkyl substituent, said &agr;-alkyl substituent is unbranched; and
provided further that the combined sum of the aliphatic carbon atoms in R1, R2 and all Z* is at least 8.
本发明公开了一种照相元件,包括一个感光
银卤乳剂层,与之相关联的是一种
酚类“NB品红偶合剂”,其
化学式为:其中,“NB品红偶合剂”代表公式(I)的偶合剂,与4-
氨基-3-甲基-N-乙基-N-(2-甲磺酰基乙基)
苯胺半
硫酸盐
水合物开发剂形成品红
染料,该
染料在旋涂时的最大吸收波长在520-590纳米范围内,而左带宽(LBW)或右带宽(RBW)使用旋涂时,至少比溶液形式下相同
染料的带宽窄5纳米;R1是一个杂环、碳环或烯基基团,具有足够的电子吸引能力的取代基,以获得在前述子句中描述的旋涂
染料的最大吸收波长在520-590纳米范围内;Y为H或偶合离去基团;每个Z*是一个独立选择的取代基团,其中p独立地为0至2;R2是一个杂环或碳环环基团,或一个烷基基团;前提是当R2是一个具有α-烷基取代基的烷基基团时,该α-烷基取代基是直链的;并且进一步提供,R1、R2和所有Z*中的脂肪族碳原子的总和至少为8。