申请人:EASTMAN KODAK COMPANY
公开号:EP0953871A1
公开(公告)日:1999-11-03
A photographic element comprises a silver halide emulsion layer having associated therewith a dye-forming coupler having Formula F-1:
wherein:
(1) W1 is a heteroatom or heterogroup;
(2) one of W2 and W3 is hydrogen or a substituent group and the other is a group of Formula F-2:
in which
X is hydrogen or a coupling-off group and Y and Z are independently selected hydrogen or a substituent; and
(3) W4 is a group of atoms necessary to form a fused ring with the ring containing W1; (4) provided that substituents may join to form a ring.
The yellow coupler provides yellow density useful for photographic purposes.
一种感光元件包括一个卤化银乳剂层,该乳剂层与具有式 F-1 的染料形成耦合剂相关联:
其中
(1) W1 是杂原子或杂基;
(2) W2 和 W3 中的一个是氢或取代基,另一个是式 F-2 的基团:
其中
X 是氢或偶联基团,Y 和 Z 是独立选定的氢或取代基团;以及
(3) W4 是与含有 W1 的环形成融合环所必需的原子团; (4) 条件是取代基可以连接形成环。
黄色耦合剂可提供对摄影有用的黄色密度。