POLYMERIC MORDANT CONTAINING NITROGEN-COORDINATING LIGAND FOR METALLIZABLE DYES

摘要

POLYMERIC MORDANT CONTAINING NITROGENCOORDINATING LIGAND FOR METALLIZABLE DYES Photographic elements and diffusion transfer assemblages are described which contain a novel mordant comprising a polymeric backbone having appended thereto nitrogen-coordinating ligands having the formula: < IMG > wherein 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. In a preferred embodiment, the mordant comprises recurring units having the formula: < IMG > wherein: R1 and R2 each independently represents hydrogen or an alkyl or substituted alkyl group having from 1 to about 6 carbon atoms; Link represents a bivalent linking group; and LIG represents a nitrogen-coordinating ligand as described above.