Silver halide emulsion and silver halide color photographic light-sensitive material
View Patent ↗A silver halide emulsion containing silver halide grains with a silver chloride content of at least 95 mole %, being sensitized with selenium and gold, and further containing at least two compounds each having a function of oxidizing metallic silver clusters; a silver halide photographic material containing the same; and a silver halide photographic material having red-, green, and blue-sensitive silver halide emulsion layers, wherein one of the emulsion layers contains a silver halide emulsion with a silver chloride content of at least 95 mole %, and the silver halide emulsion contains a selenium compound and a metal complex of formula (D1); [M D1 X D1 n L D1 (6-n) ] m formula (D1) wherein M D1 represents Cr, Mo, Re, Fe, Ru, Os, Co, Rh, Pd, or Pt; X D1 represents a halogen ion; L D1 represents a ligand other than X D1 ; n represents 3, 4, 5, or 6; and m represents 4−, 3−, 2−, 1−, 0, or 1+.
1. A silver halide emulsion containing silver halide grains with a silver chloride content of at least 95 mole %, being sensitized with selenium and gold, and further comprising at least two kinds of compounds each having a function of oxidizing metallic silver clusters.
2. The silver halide emulsion as claimed in claim 1 , wherein the silver halide grains have an average side length ranging from 0.10 μm to 0.60 μm.
3. A silver halide color photographic light-sensitive material having, on a support, a yellow-dye-forming silver halide emulsion layer, a magenta-dye-forming silver halide emulsion layer, and a cyan-dye-forming silver halide emulsion layer, wherein at least one silver halide emulsion layer contains the silver halide emulsion as claimed in claim 1 .
4. A silver halide color photographic light-sensitive material having, on a support, a yellow-dye-forming silver halide emulsion layer, a magenta-dye-forming silver halide emulsion layer, and a cyan-dye-forming silver halide emulsion layer, wherein the yellow-dye-forming silver halide emulsion layer contains the silver halide emulsion as claimed in claim 1 .
5. A silver halide color photographic light-sensitive material having, on a support, a yellow-dye-forming silver halide emulsion layer, a magenta-dye-forming silver halide emulsion layer, and a cyan-dye-forming silver halide emulsion layer, wherein the silver halide emulsion layer nearest to the support contains the silver halide emulsion as claimed in claim 1 .
6. A silver halide emulsion containing silver halide grains with a silver chloride content of at least 95 mole %, being sensitized with selenium and gold, and further comprising at least two compounds selected from the following Groups A to F;
Group A: a compound represented by the following formula (I),
Group B: a compound represented by the following formula (II),
Group C: a compound represented by the following formula (III),
Group D: hydrogen peroxide or a hydrogen peroxide adduct,
Group E: chlorous acid,
Group F: an inorganic sulfur;
wherein R 1 , R 2 , and R 3 each independently represent an aliphatic group, an aromatic group, or a heterocyclic group, and R 2 and R 3 may combine with each other to form a ring; M represents a cation; R 4 , R 5 , and R 6 each independently represent a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an alkoxy group, a hydroxyl group, a halogen atom, an aryloxy group, an alkylthio group, an arylthio group, an acyl group, a sulfonyl group, an acyloxy group, a carboxyl group, a cyano group, a nitro group, a sulfo group, an alkylsulfoxido group, or a trifluoroalkyl group, and any two groups among R 4 , R 5 , and R 6 may combine with each other to form a 5- or 6-membered ring or a polycyclic system; R 7 represents a carboxylate or O − ; X − represents an anion as a counter ion; and w represents 0 or 1; provided that w is 0 and R 7 is O − when R 6 is a carboxyl group or a sulfo group.
7. The silver halide emulsion as claimed in claim 6 , wherein the at least two compounds are selected from different groups of Groups A to F.
8. The silver halide emulsion as claimed in claim 6 , wherein the silver halide grains have an average side length ranging from 0.10 μm to 0.60 μm.
9. A silver halide color photographic light-sensitive material having, on a support, a yellow-dye-forming silver halide emulsion layer, a magenta-dye-forming silver halide emulsion layer, and a cyan-dye-forming silver halide emulsion layer, wherein at least one silver halide emulsion layer contains the silver halide emulsion as claimed in claim 6 .
10. A silver halide color photographic light-sensitive material having, on a support, a yellow-dye-forming silver halide emulsion layer, a magenta-dye-forming silver halide emulsion layer, and a cyan-dye-forming silver halide emulsion layer, wherein the yellow-dye-forming silver halide emulsion layer contains the silver halide emulsion as claimed in claim 6 .
11. A silver halide color photographic light-sensitive material having, on a support, a yellow-dye-forming silver halide emulsion layer, a magenta-dye-forming silver halide emulsion layer, and a cyan-dye-forming silver halide emulsion layer, wherein the silver halide emulsion layer nearest to the support contains the silver halide emulsion as claimed in claim 6 .
12. The silver halide emulsion as claimed in claim 1 , wherein the silver halide grains are cubic or tetradecahedral grains.
13. The silver halide emulsion as claimed in claim 1 , wherein the silver halide grains contain a hexacoordinate complex containing iridium as a central metal.
14. The silver halide emulsion as claimed in claim 13 , wherein the complex is represented by the formula (D2B):
[IrX D2B n L D2B (6-n) ] m formula (D2B)
wherein X D2B represents a halogen ion or a pseudohalogen ion other than a cyanate ion; L D2B represents a heterocyclic compound; n represents 3, 4, or 5; m represents 5−, 4−, 3−, 2−, 1−, 0, or 1+.
15. The silver halide emulsion as claimed in claim 1 , wherein the silver halide grains contain at least one kind of hexacoordinate complex containing iridium as a central metal and at least one kind of a metal complex represented by formula (D1):
[M D1 X D1 n L D1 (6-n) ] m formula (D1)
wherein, in formula (D1), M D1 represents Cr, Mo, Re, Fe, Ru, Os, Co, Rh, Pd, or Pt; X D1 represents a halogen ion; L D1 represents a ligand other than X D1 ; n represents 3, 4, 5, or 6; and m is an electric charge of the metal complex and represents 4−, 3−, 2−, 1−, 0, or 1+; plural X D1 s may be the same or different; and when plural L D1 s exist, the plural L D1 s may be the same or different; provided that the metal complex represented by formula (D1) has no or only one CN ion as a ligand.
16. The silver halide emulsion as claimed in claim 1 , wherein the silver halide grains having at least one of a silver iodide-containing phase at any of positions ranging from 85 to 100% of the grain volume measured from the inside of the respective grains and a silver bromide-containing phase at any of positions ranging from 70 to 95% of the grain volume measured from the inside of the respective grains.
17. The silver halide emulsion as claimed in claim 1 , wherein the silver halide grains have a silver iodide-containing phase which is formed by adding iodide ions or fine silver halide grains containing silver iodide and by finishing said addition at any of positions ranging up to 98% of the grain volume measured from the inside of the respective grains.
18. The silver halide emulsion as claimed in claim 6 , comprising a compound represented by formula (I) and a compound represented by formula (II).
19. The silver halide emulsion as claimed in claim 6 , comprising a compound represented by formula (I) and a compound represented by formula (III).
20. The silver halide emulsion as claimed in claim 6 , comprising an inorganic sulfur and a compound represented by formula (II).