Photographic elements employing novel, nondiffusible 2-(2-pyridylazo)-4,5-bis(tertiary amino)phenol black dye-releasing compounds or precursors thereof
申请人:EASTMAN KODAK COMPANY
(a New Jersey corporation)
公开号:EP0070018A1
公开(公告)日:1983-01-19
Photographic elements are described which employ a novel, nondiffusible compound having a releasable, 2-(2-pyridylazo)-4,5-bis(tertiary amino)phenol black dye moiety or precursor thereof, having the formula
wherein
(a) R represents hydrogen, a hydrolyzable moiety or CAR;
(b) R' and R2 each independently represents an alkyl group of 1 to 6 carbon atoms, CAR, or can be taken together with the nitrogen atom to which they are attached to complete a 5- or 6-membered heterocyclic ring;
(c) R3 and R4 each independently represents an alkyl group of 1 to 6 carbon atoms, CAR, or can be taken together with the nitrogen to which they are attached to complete a 5- or 6-membered heterocyclic ring;
(d) CAR represents a ballasted carrier moiety capable of releasing the diffusible black dye moiety, or precursor thereof, under alkaline conditions; and
(e) n is 0, 1 or 2, with the proviso that when n is 0, then at least one of R, R1, R2, R3, or R is CAR.
所述摄影元件采用了一种新型的不可扩散化合物,该化合物具有可释放的 2-(2-吡啶偶氮)-4,5-双(叔氨基)苯酚黑色染料分子或其前体,其分子式为
式中
(a) R 代表氢、可水解基团或 CAR;
(b) R'和 R2 各自独立地代表 1 至 6 个碳原子的烷基、CAR 或可与所连接的氮原子一起组成 5 或 6 元杂环;
(c) R3 和 R4 各自独立地代表 1 至 6 个碳原子的烷基、CAR 或可与连接它们的氮原子结合成一个 5 或 6 元杂环;
(d) CAR 代表能在碱性条件下释放可扩散黑色染料分子或其前体的压载载体分子; 以及
(e) n 为 0、1 或 2,但当 n 为 0 时,R、R1、R2、R3 或 R 中至少有一个是 CAR。