Silver halide emulsion, silver halide photosensitive material, and photothermographic material
View Patent ↗A silver halide emulsion containing a compound represented by the following formula (1) or (2): wherein R 1 represents an OH group, an SH group, or an —NR 2 R 3 group in which R 2 and R 3 each independently represent a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an alkylsulfonyl group, or an arylsulfonyl group; L represents an alkenylene group, an arylene group, an —N═N— group, a divalent aromatic heterocyclic group, or a —C(R 4 )═N— group in which R 4 represents a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group; n represents 0 or 1; X and Y each independently represent a nitrogen atom or a —CR 5 — group in which R 5 represents a hydrogen atom or a substituent bondable to the carbon atom; Z represents an atomic group in the 5- to 7-membered ring; and M represents a hydrogen atom, a metal ion, or a quaternary ammonium ion.
1. A silver halide emulsion comprising a silver halide and a compound represented by the following formula (1) or (2):
wherein in Formula (1) and Formula (2), R 1 represents an OH group, an SH group, or an —NR 2 R 3 group in which R 2 and R 3 each independently represent a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an alkylsulfonyl group, or an arylsulfonyl group; L represents an alkenylene group, an arylene group, an —N═N— group, a divalent aromatic heterocyclic group, or a —C(R 4 )═N— group in which R 4 represents a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group; n represents 0 or 1; X and Y each independently represent a nitrogen atom or a —CR 5 — group in which R 5 represents a hydrogen atom or a substituent that can be bonded to the carbon atom; Z represents an atomic group that is necessary for forming the ring selected from a benzene ring, a naphthalene ring, a pyridine ring, a quinoline ring, an isocquinoline ring, a pyrrole ring, a furan ring, a thiophene ring, an imidazole ring, a thiazole ring, an oxazole ring, a triazole ring, a thiadiazole ring a pyrimidine ring, and a triazine ring; and M represents a hydrogen atom, a metal ion, or a quaternary ammonium ion.
2. A silver halide emulsion according to claim 1 , wherein the compound of Formula (1) or (2) is represented by the following formula (1-a):
wherein in Formula (1-a), R 1 represents an OH group, an SH group, or an NR 2 R 3 group in which R 2 and R 3 each independently represent a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an alkylsulfonyl group, or an arylsulfonyl group; L represents an alkenylene group, an arylene group, an —N═N— group, a divalent aromatic heterocyclic group, or a —C(R 4 )═N— group in which R 4 represents a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group; n represents 0 or 1; R6 represents a hydrogen atom or a substituent that can be bonded to the carbon atom; A represents a sulfur atom or an —NR 7 — group in which R 7 represents a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group; and M represents a hydrogen atom, a metal ion, or a quaternary ammonium ion.
3. A silver halide emulsion according to claim 1 , wherein the compound of Formula (1) or (2) has a group that can adsorb the silver halide.
4. A silver halide emulsion according to claim 1 , wherein the compound of Formula (1) or (2) has a ballast group or a polymer moiety.
5. A silver halide photosensitive material comprising a support and the silver halide emulsion according to claim 1 provided on at least one surface of the support.
6. A silver halide photosensitive material according to claim 5 , wherein the compound of Formula (1) or (2) is represented by the following formula (1-a):
wherein in Formula (1-a), R 1 represents an OH group, an SH group, or an NR 2 R 3 group in which R 2 and R 3 each independently represent a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an alkylsulfonyl group, or an arylsulfonyl group; L represents an alkenylene group, an arylene group, an —N═N— group, a divalent aromatic heterocyclic group, or a —C(R 4 )═N— group in which R 4 represents a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group; n represents 0 or 1; R6 represents a hydrogen atom or a substituent that can be bonded to the carbon atom; A represents a sulfur atom or an —NR 7 — group in which R 7 represents a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group; and M represents a hydrogen atom, a metal ion, or a quaternary ammonium ion.
7. A silver halide photosensitive material according to claim 5 , wherein the compound of Formula (1) or (2) has a group that can adsorb the silver halide.
8. A silver halide photosensitive material according to claim 5 , wherein the compound of Formula (1) or (2) has a ballast group or a polymer moiety.
9. A silver halide photosensitive material according to claim 5 , wherein the silver halide has an average silver iodide content of 40 to 100 mol %.
10. A silver halide photosensitive material according to claim 5 , wherein the photosensitive silver halide comprises silver halide grains having an average sphere-equivalent diameter of 0.3 to 5.0 μm.
11. A silver halide photosensitive material according to claim 5 , wherein the photosensitive silver halide comprises silver halide grains and 50% or more of a projected area of the silver halide grains is occupied by tabular grains having aspect ratios of 2 to 50.
12. A photothermographic material comprising a support and an image-forming layer provided on at least one surface of the support, wherein the image-forming layer comprises a non-photosensitive organic silver salt, a reducing agent for silver ions, a binder, and the silver halide emulsion according to claim 1 .
13. A photothermographic material according to claim 12 , wherein the compound is represented by the following formula (1-a):
wherein in Formula (1-a), R 1 represents an OH group, an SH group, or an NR 2 R 3 group in which R 2 and R 3 each independently represent a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, an alkylsulfonyl group, or an arylsulfonyl group; L represents an alkenylene group, an arylene group, an —N═N— group, a divalent aromatic heterocyclic group, or a —C(R 4 )═N— group in which R 4 represents a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group; n represents 0 or 1; R6 represents a hydrogen atom or a substituent that can be bonded to the carbon atom; A represents a sulfur atom or an —NR 7 — group in which R 7 represents a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group; and M represents a hydrogen atom, a metal ion, or a quaternary ammonium ion.
14. A photothermographic material according to claim 12 , wherein the silver halide has an average silver iodide content of 40 to 100 mol %.
15. A photothermographic material according to claim 13 , wherein the silver halide has an average silver iodide content of 40 to 100 mol %.
16. A photothermographic material according to claim 12 , wherein the photosensitive silver halide comprises silver halide grains having an average sphere-equivalent diameter of 0.3 to 5.0 μm.
17. A photothermographic material according to claim 13 , wherein the photosensitive silver halide comprises silver halide grains having an average sphere-equivalent diameter of 0.3 to 5.0 μm.
18. A photothermographic material according to claim 12 , wherein the photosensitive silver halide comprises silver halide grains and 50% or more of a projected area of the silver halide grains is occupied by tabular grains having aspect ratios of 2 to 50.
19. A photothermographic material according to claim 13 , wherein the photosensitive silver halide comprises silver halide grains and 50% or more of a projected area of the silver halide grains is occupied by tabular grains having aspect ratios of 2 to 50.