Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a cyan “NB coupler” having the formula (I):
1
wherein
the term “NB coupler” represents a coupler of formula (I) that forms a dye for which the left bandwidth (LBW) using spin-coating is at least 5 nm less than that of the same dye in solution form;
Y is H or a coupling-off group;
each Z″ and Z* is an independently selected substituent group where n is 0 to 4 and p is 0 to 2;
W
2
represents the atoms necessary to complete a heterocyclic ring group; and
V is a sulfone or sulfoxide containing group;
provided that the combined sum of the aliphatic carbon atoms in V, all Z″ and all Z* is at least 8. The element exhibits improved cyan dye hue.
揭示了一种包括具有与之相关联的
氰“NB
偶联剂”(具有式(I))的感光
银卤化物乳胶层的照相元件:其中术语“NB
偶联剂”表示具有式(I)的
偶联剂,其形成的
染料的左带宽度(LBW)在旋涂过程中至少比溶液形式中的相同
染料的左带宽度小至少5纳米;Y为H或偶联脱落基团;每个Z″和Z*是独立选择的取代基团,其中n为0至4,p为0至2;W2代表完成杂环环基所需的原子;V是含有磺酮或亚砜基团;前提是V中的脂肪碳原子总和,所有Z″和所有Z*的总和至少为8。该元件呈现出改进的青色
染料色调。