Physical development of Pd(II) photosensitive complexes with a leucophthalocyanine dye and a reducing agent therefor
AssigneeEastman Kodak Company
InventorsHenry J. Gysling, Mark Lelental
Life of this patent
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Abstract
A process for the formation of phthalocyanine dye images employing palladium nuclei to catalyze the reduction of a leucophthalocyanine to the phthalocyanine dye image by a reducing agent.
Claims32
A process of preparing phthalocyanine dye image comprising imagewise forming palladium nuclei and catalytically reducing a leucophthalocyanine dye in contact with said palladium nuclei, with a reducing agent that does not spontaneously reduce the leucophthalocyanine dye.
A process of preparing a phthalocyanine dye image comprising forming a latent image of palladium nuclei by imagewise exposing to electromagnetic radiation one or more sterically hindered palladium complexes chosen from the group represented by the general formula:
- [Pd(L).sub.g (X).sub.h ].sub.i Y.sub.j
- wherein:
- L is a sterically hindered polydentate nitrogen ligand,
- X is a univalent anion chosen from the group consisting of chloride, bromide, azide, thiocyanate, selenocyanate, tellurocyanate, nitrate, acetate,
- Y is X or a tetraarylborate;
- g and h are 1 or 2;
- g + h is an integer from 2 through 4;
- i is an integer from 1 through 4;
- and
- j is an integer from 1 through 4;
- and catalytically reducing a leucophthalocyanine dye in contact with said palladium nuclei, with a borane reducing agent which does not spontaneously reduce said leucophthalocyanine dye or said palladium complexes said reducing agent being selected from the group consisting of amine boranes, phosphite boranes, arsine boranes, phosphine boranes, stibine boranes, boronium salts and cyanoborohydride ion.
A process of preparing a phthalocyanine dye image comprising forming a latent image of palladium nuclei by imagewise exposing to electromagnetic radiation one or more palladium complexes chosen from the group represented by the general formula:
- [Pd(G).sub.a (J).sub.b (K).sub.c (N).sub.d ].sub.e M.sub.f
- wherein
- G, j, k and N are ligands selected from the group consisting of halogen ligands, carboxylic acid ligands, aromatic ligands, nitrogen ligands, phosphorous ligands and arsenic ligands;
- M is selected from the group consisting of ions selected from the group consisting of hydrogen ions, inorganic acid ions, organic acid ions, and metal ions selected from the group consisting of sodium ions, potassium ions, calcium ions, strontium ions and aluminum ions and onium ions;
- a + b + c + d is an integer from 1 through 4;
- e is 1 or 2;
- and
- f is an integer from 0 through 8, and catalytically reducing a leucophthalocyanine dye in contact with said palladium nuclei, with a reducing agent which does not spontaneously reduce said leucophthalocyanine dye or said palladium complexes.
A photographic element comprising a photosensitive layer comprising one or more palladium complexes said complexes being capable of forming palladium nuclei on exposure to electromagnetic radiation, a layer comprising a leucophthalocyanine dye and a layer containing a reducing agent which does not spontaneously reduce said leucophthalocyanine dye or said palladium complexes and being capable of reducing said leucophthalocyanine dye to phthalocyanine dye in the presence of said palladium nuclei, said layers being in reactive association with one another.
A photographic element comprising a photosensitive layer comprising one or more palladium complexes said complexes being capable of forming palladium nuclei on exposure to electromagnetic radiation, and a layer comprising a leucophthalocyanine dye, said layers being in reactive association with one another.
A photographic element comprising a photosensitive layer comprising one or more palladium complexes capable of forming palladium nuclei on exposure to electromagnetic radiation, said;
- palladium complexes are chosen from the group represented by the general formula:
- [Pd(L).sub.g (X).sub.h ].sub.i Y.sub.j
- wherein;
- L is a sterically hindered polydentate nitrogen ligand,
- X is a univalent anion chosen from the group consisting of chloride, bromide, azide, thiocyanate, selenocyanate, tellurocyanate, nitrate, acetate;
- Y is X or a tetraarylborate;
- g and h are 1 or 2;
- g + h is at least 2;
- i is an integer from 1 through 4;
- and
- j is an integer from 1 through 4;
- and a layer comprising a reducing agent which does not spontaneously reduce said palladium complexes and being capable of reducing a 1eucophthalocyanine dye to phthalocyanine dye in contact with said palladium nuclei, said reducing agent is chosen from the group consisting of amine boranes, phosphine boranes, arsine boranes, phosphite boranes, stibine boranes, boronium salts and cyanoborohydride ion, said layers being in reactive association with one another.
Dependencies are inferred from the claim text.