| 摘要 |
Photographic elements, diffusion transfer assemblages and coordination complexes are described which employ a novel nondiffusible compound capable of releasing at least one diffusible dye moiety having the formula: <IMAGE> wherein: (a) D1, D2 and D3 each independently represents the atoms necessary to complete an aromatic heterocyclic nucleus having at least one ring of 5 to 7 atoms; (b) Z1 and Z2 each independently represents the atoms necessary to complete an aromatic carbocyclic or heterocyclic nucleus having at least one ring of 5 to 7 atoms or a ketomethine group; (c) G1 and G2 each independently represents a metal chelating group; (d) Me is a polyvalent, hexacoordinate metal ion, (e) CAR represents a ballasted carrier moiety capable of releasing the diffusible dye moiety as a function of development of the silver halide emulsion layer under alkaline conditions; and (f) n is 1, 2 or 3. |
