Silver halide emulsion and silver halide photosensitive material
AssigneeFuji Photo Film Co., Ltd.
InventorsShinichi Nakahira, Tatsuya Ishizaka
Life of this patent
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Abstract
Disclosed are a silver halide emulsion and a silver halide photosensitive material copmrising a support and at least one photosensitive layer comprising the silver halide emulsion. The photosensitive emulsion comprises silver halide grains, wherein the silver chloride content is 90 mole % or more; the silver halide grains contain (I) at least one member of a six-coordinated complex in which iridium (Ir) is a central metal having halogen atom and O, H2O, thiazole or substituted thiazole as ligands and (II) at least one member of a six-coordinated complex in which iridium (Ir) is a central metal having halogen atom as a ligand; and the iridium compound (II) is present in a localized silver bromide phase.
Claims26
A silver halide emulsion containing silver halide grains, with no less than 90 mol % of said silver halide grains being silver chloride and the silver halide grains containing at least one iridium compound (A) and at least one iridium compound (B), wherein
- (i) the iridium compound (A) is represented by formula (I),
- (ii) the iridium compound (B) is represented by formula (II), and at least 50 mol % of the iridium compound (B) is present in a localized silver bromide phase where the localized silver bromide content is no less than 10 mol %, and
- (iii) the silver halide grains have a localized silver bromide phase where the localized silver bromide content is at least 5 mol % in a silver amount region where at least 5 mol % of total silver amount contained in the silver halide grains is present,
- with formulae (I) and (II) being:
- [Ir(Y)n(Xa)m]l Formula (I)
- wherein Xa is a halogen atom;
- Y is O or H2O;
- and l, m and n are integers selected from ranges of from −2 to +3, from 1 to 5 and from 1 to 5, respectively;
- and
- [Ir(Xb)6]p Formula (II)
- wherein Xb is a halogen atom;
- and p is an integer selected from a range of from −2 to −3.
A silver halide photosensitive material comprising a support having disposed thereon at least one layer containing a silver halide emulsion containing silver halide grains, with no less than 90 mol % of said silver halide grains being silver chloride and the silver halide grains containing at least one iridium compound (A) and at least one iridium compound (B), wherein
- (i) the iridium compound (A) is represented by the formula (I),
- (ii) the iridium compound (B) is represented by the formula (II), and at least 50 mol % of the iridium compound (B) is present in a localized silver bromide phase where the localized silver bromide content is no less than 10 mol %, and
- (iii) the silver halide grains have a localized silver bromide phase where the localized silver bromide content is at least 5 mol % in a silver amount region where at least 5 mol % of total silver amount contained in the silver halide grains is present,
- with formulae (I) and (II) being:
- [Ir(Y)n(Xa)m]l Formula (I)
- wherein Xa is a halogen atom;
- Y is O or H2O;
- and l, m and n are integers selected from ranges of from −2 to +3, from 1 to 5 and from 1 to 5, respectively;
- and
- [Ir(Xb)6]p Formula (II)
- wherein Xb is halogen atom;
- and p is an integer selected from a range of from −2 to −3.
A silver halide emulsion containing silver halide grains, with no less than 90 mol % of said silver halide grains being silver chloride and the silver halide grains containing at least one iridium compound (A) and at least one iridium compound (B), wherein
- (i) the iridium compound (A) is represented by formula (I)′,
- (ii) the iridium compound (B) is represented by formula (II), and at least 50 mol % of the iridium compound (B) is present in a localized silver bromide phase where the localized silver bromide content is no less than 10 mol %, and
- (iii) the silver halide grains have a localized silver bromide phase where the localized silver bromide content is at least 5 mol % in a silver amount region where at least 5 mol % of total silver amount contained in the silver halide grains is present,
- with formulae (I)′ and (II) being:
- [Ir(Y)n(Xa)m]l Formula (I)′
- wherein Xa is a halogen atom;
- Y is thiazole or substituted thiazole;
- and l, m and n are integers selected from ranges of from −2 to +3, from 1 to 5 and from 1 to 5, respectively;
- and
- [Ir(Xb)6]p Formula (II)
- wherein Xb is a halogen atom;
- and p is an integer selected from a range of from −2 to −3.
A silver halide photosensitive material comprising a support having disposed thereon at least one layer containing a silver halide emulsion containing silver halide grains, with no less than 90 mol % of said silver halide grains being silver chloride and the silver halide grains containing at least one iridium compound (A) and at least one iridium compound (B), wherein
- (i) the iridium compound (A) is represented by the formula (I)′,
- (ii) the iridium compound (B) is represented by the formula (II), and at least 50 mol % of the iridium compound (B) is present in a localized silver bromide phase where the localized silver bromide content is no less than 10 mol %, and
- (iii) the silver halide grains have a localized silver bromide phase where the localized silver bromide content is at least 5 mol % in a silver amount region where at least 5 mol % of total silver amount contained in the silver halide grains is present,
- with formulae (I)′ and (II) being:
- [Ir(Y)n(Xa)m]l Formula (I)′
- wherein Xa is a halogen atom;
- Y is thiazole or substituted thiazole;
- and l, m and n are integers selected from ranges of from −2 to +3, from 1 to 5 and from 1 to 5, respectively;
- and
- [Ir(Xb)6]p Formula (II)
- wherein Xb is halogen atom;
- and p is an integer selected from a range of from −2 to −3.
Dependencies are inferred from the claim text.