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EP0474047A1
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Silver halide emulsion
Assignee: Fujifilm Holdings Corp
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Filing: 1991-08-22
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Granted: —
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Expires: 2011-08-22
Abstract
Abstract Disclosed is a silver halide emulsion, which comprises at least one methine dye represented by the general formula (I): wherein MET represents an atomic group having a methine dye structure; Q represents a divalent linking group containing at least one carbon, nitrogen, sulfur or oxygen atom; ℓ 1 represents an integer 1 or 2; 1 2 represents an integer 0 or 1, ℓ 3 represents an integer from 1 to 4; and Ar represents an aromatic polycyclic group formed of 8 or more atoms containing at least one nitrogen atom, with the proviso that said nitrogen atom is in a form such that tautomerism does not produce Also disclosed is a silver halide photographic material, which comprises on a support a silver halide photographic emulsion layer comprising silver halide grains containing iron ions in an amount of 10- 7 to 10- 3 mol per mol of silver halide and having a localized phase with an iron ion concentration of 10 times or more than that of the other portions, in a surface layer falling within 50% or less of the volume of the grain and at least one methine dye represented by general formula (I') and which exhibits a blue sensitivity difference of 0.1 or less between when it is developed after exposure in vacuo under 10- 5 torr and when it is developed after exposure in air under 760 torr: wherein MET represents an atomic group having a methine dye structure; Q represents a divalent linking group containing at least one of a carbon, a nitrogen, a sulfur or an oxygen atom; Ar' represents an aromatic polycyclic group formed of 8 or more atoms; ℓ 1 represents an integer 1 or 2; 1 2 represents an integer 0 or 1; and ℓ 3 represents an integer from 1 to 4.
Inventors
- 👤 Takanori C/O Fuji Photo Film Co. Ltd. Hioki
- 👤 Atsushi c/o Fuji Photo Film Co. Ltd. Matsunaga
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 22:03
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; C; C09; C09B; C09B23/00; C09B23/0066; C09B23/02; C09B23/10; G03C1/10; G03C1/12; G03C5/00; G03C5/16; G03C5/164; G03C1/035; G03C1/14; G03C1/16; G03C1/18; G03C1/20; G03C1/26; G03C2001/03511; G03C2001/03517; G03C2001/03535
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
106 words
A silver halide emulsion, which comprises at least one methine dye represented by the general formula (I): wherein MET represents an atomic group having a methine dye structure; Q represents a divalent linking group containing at least one carbon, nitrogen, sulfur or oxygen atom; ℓ 1 , represents an integer 1 or 2; 1 2 represents an integer 0 or 1, ℓ 3 represents an integer from 1 to 4; and Ar represents an aromatic polycyclic group formed of 8 or more atoms containing at least one nitrogen atom, with the proviso that said nitrogen atom is in a form such that tautomerism does not produce
Claim 2
Dependent Claim
106 words
A silver halide emulsion, which comprises at least one methine dye represented by the general formula (I): wherein MET represents an atomic group having a methine dye structure; Q represents a divalent linking group containing at least one carbon, nitrogen, sulfur or oxygen atom; ℓ 1 , represents an integer 1 or 2; 1 2 represents an integer 0 or 1, ℓ 3 represents an integer from 1 to 4; and Ar represents an aromatic polycyclic group formed of 8 or more atoms containing at least one nitrogen atom, with the proviso that said nitrogen atom is in a form such that tautomerism does not produce
Claim 3
Dependent Claim
31 words
A silver halide emulsion as claimed in claim 1, wherein the oxidation potential of said methine dye represented by the general formula (I) is 0.60 (V vs SCE) or lower .
Claim 4
Dependent Claim
293 words
A silver halide emulsion as claimed in claim 1, which further comprises at least one of compounds represented by the general formulae [IV], [V], [VI] or [VII]: wherein A 1 represents a divalent aromatic residue; R 9 , Rio, R 11 and R 12 each represents a hydrogen atom, hydroxyl group, alkyl group, alkoxy group, aryloxy group, halogen atom, heterocyclic nucleus, heterocyclylthio group, arylthio group, amino group, alkylamino group, arylamino group, aralkylamino group, aryl group or mercapto group which may be substituted, with the proviso that at least one of A 1 , R 9 , R 10 , R 11 and R 12 contains a sulfo group; X 1 and Y 1 , and X 1 ' and Y 1 ' each represents -CH and -N =, respectively; and at least one X 1 and Y 1 or X' 1 and Y' 1 represents -N =; wherein Z 11 represents an atomic group required to form a 5- or 6-membered nitrogen-containing heterocyclic group which may be condensed with a benzene or naphthalene ring; R 1 represents a hydrogen atomn or alkyl group; R 1 represents a hydrogen atom or alkyl group; and X 2 - represents an anion; wherein R 15 represents an alkyl group or aryl group; and X 3 represents a hydrogen atom, alkaline metal group, ammonium group or precursor; wherein Y 2 represents an oxygen atom, sulfur atom, =NH or =N-(L 57 ) n14 -R 17 ; L 56 and L 57 each represents a divalent linking group; R 16 and R 17 each represents a hydrogen atom, alkyl group or aryl group; X 4 represents a hydrogen atom, alkaline metal atom, ammonium group or precursor; and n 13 and n 14 each represents an integer 0 or 1.
Claim 5
Dependent Claim
17 words
A silver halide emulsion as claimed in claim 1, wherein MET is a hexamethinemerocyanine or a heptamethinecyanine.
Claim 6
Dependent Claim
18 words
A silver halide emulsion as claimed in claim 1, wherein Ar is either Compound (a) or Compound (b):
Claim 7
Dependent Claim
158 words
A silver halide emulsion as claimed in claim 1, wherein MET is a hexamethinemerocyanine compound represented by the following general formula (II): wherein Z 1 represents an atomic group required to form a 5- or 6-membered nitrogen-containing heterocyclic group; D and D' each represents and atomic group required to form a noncyclic or cyclic acidic nucleus; R 1 represents an alkly group; L 1 , L 2 , L 3 , L 4 , L s , L 6 , L 7 , L 8 , L 9 , and L 10 each represents a methine group or substituted methine group; these methine groups may form a ring with other methine groups or may form a ring with auxochromes; the suffixes ni , and n 2 each represents an integer 0 or 1; and M 1 represents a charge-neutralization paired ion, and m 1 represents an integer 0 or higher required to neutralize the charge in the molecule.
Claim 8
Dependent Claim
152 words
A silver halide emulsion as claimed in claim 1, wherein MET is a heptamethinecyanine compound represented by the following general formula (III): wherein Z 2 and Z 3 each represents an atomic group required to form a 5- or 6-membered nitrogen-containing heterocyclic group; R 2 and R 3 each represents an alkly group; L 11 , L 12 , L 13 , L 14 , L 15 , L 16 , L 17 , L 18 , L 19 , L 2 o, and L 21 each represents a methine group or substituted methine group; these methine groups may form a ring with other methine groups or may form a ring with auxochromes; the suffixes n 3 abd n 4 each represents an integer 0 or 1; and M 2 represents a charge-neutralization paired ion, and m 2 represents an integer 0 or higher required to neutralize the charge in the molecule.
Claim 9
Dependent Claim
193 words
A silver halide photographic material, which comprises on a support a silver halide photographic emulsion layer comprising silver halide grains containing iron ions in an amount of 10- 7 to 10- 3 mol per mol of silver halide and having a localized phase with an iron ion concentration of 10 times or more than that of the other portions, in a surface layer falling within 50% or less of the volume of the grain and at least one methine dye represented by general formula (I') and which exhibits a blue sensitivity difference of 0.1 or less between when it is developed after exposure in vacuo under 10- 5 torr and when it is developed after exposure in air under 760 torr: wherein MET represents an atomic group having a methine dye structure; Q represents a divalent linking group containing at least one of a carbon, a nitrogen, a sulfur or an oxygen atom; Ar' represents a polycyclic group having aromaticity formed of 8 or more atoms; ℓ 1 , represents an integer 1 or 2; 1 2 represents an integer 0 or 1; and ℓ 3 represents an integer from 1 to 4.
Claim 10
Dependent Claim
193 words
A silver halide photographic material, which comprises on a support a silver halide photographic emulsion layer comprising silver halide grains containing iron ions in an amount of 10- 7 to 10- 3 mol per mol of silver halide and having a localized phase with an iron ion concentration of 10 times or more than that of the other portions, in a surface layer falling within 50% or less of the volume of the grain and at least one methine dye represented by general formula (I') and which exhibits a blue sensitivity difference of 0.1 or less between when it is developed after exposure in vacuo under 10- 5 torr and when it is developed after exposure in air under 760 torr: wherein MET represents an atomic group having a methine dye structure; Q represents a divalent linking group containing at least one of a carbon, a nitrogen, a sulfur or an oxygen atom; Ar' represents a polycyclic group having aromaticity formed of 8 or more atoms; ℓ 1 , represents an integer 1 or 2; 1 2 represents an integer 0 or 1; and ℓ 3 represents an integer from 1 to 4.
Claim 11
Dependent Claim
72 words
A silver halide photographic material as claimed in claim 8, wherein the halogen composition of silver halide grains contained in said emulsion layer is silver bromochloride substantially free of silver iodide, 90 mol% or more of which is silver chloride, and the grain structure is such that a silver bromide localized phase with a silver bromide content of 10 to 70 mol% is provided inside the grains or on the surface thereof.
Claim 12
Dependent Claim
30 words
A silver halide photographic material as claimed in claim 8, wherein the iron ions are in an amount from 10- 6 to 5x10- 4 mol per mol of silver halide.
References Cited (Backward Citations)
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