Photographic elements, diffusion transfer assemblages and processes 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, such as: ##STR1## wherein: (a) R represents hydrogen, a hydrolyzable moiety or CAR; (b) R.sup.1 and R.sup.2 each independently represents an alkyl group of 1 to about 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) R.sup.3 and R.sup.4 each independently represents an alkyl group of 1 to about 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, R.sup.1, R.sup.2, R.sup.3, or R.sup.4 is CAR.
描述了一种使用新型不可扩散化合物的摄影元素、扩散转移组合物和过程,该化合物具有可释放的2-(2-
吡啶偶氮)-4,5-双(三级胺)
苯酚黑色
染料基团或其前体,例如:##STR1## 其中:(a) R代表氢,可
水解的基团或CAR; (b) R.sup.1和R.sup.2各自独立地表示1至约6个碳原子的烷基,CAR,或者可以与它们所附着的氮原子一起形成一个5-或6-成员杂环环;(c) R.sup.3和R.sup.4各自独立地表示1至约6个碳原子的烷基,CAR,或者可以与它们所附着的氮原子一起形成一个5-或6-成员杂环环;(d) CAR表示一个平衡载体基团,能够在碱性条件下释放可扩散的黑色
染料基团或其前体;(e) n为0、1或2,但当n为0时,至少有一个R、R.sup.1、R.sup.2、R.sup.3或R.sup.4为CAR。