Abstract A photographic silver halide emulsion containing at least one sensitizing dye represented by the general formula I wherein Z1 represents a nonmetallic atomic group forming a 4quinoline nucleus, Z2 represents a nonmetallic atomic group necessary to complete a member selected from the group consisting of a 5-membered heterocyclic ring and a 6-membered heterocyclic ring, R1 and R2 each represents a member selected from the group consisting of a nonsubstituted alkyl group and a substituted alkyl group, R3 represents a member selected from the group consisting of a hydrogen atom and an alkylene group condensed with R2, X represents an acid anionic group, and p and m each represents 1 or 2, said X forming an intramolecular salt when p is 1, and AT LEAST ONE COMPOUND REPRESENTED BY THE GENERAL WHEREIN D represents a divalent aromatic residual group, R4 and R6 each represents a member selected from the group consisting of a hydrogen atom, a hydroxyl group, a halogen atom, an alkoxyl group, an aryloxyl group, and arylthio group, R5 represents a member selected from the group consisting of an aryloxyl group and an arylthio group, and W represents a member selected from the group consisting of CH and N.
The photographic silver halide emulsion as claimed in claim 1 wherein said sensitizing dye is a compound selected from the group consisting of:
Claim 2
Dependent Claim
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The photographic silver halide emulsion as claimed in claim 1 wherein said compound represented by general formula II is selected from the group consisting of:
Claim 3
Dependent Claim
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The emulsion of claim 1 wherein said D is substituted with an -SO3M group, where M is selected from the group consisting of a hydrogen atom and a metal which forms a water-soluble salt.
Claim 4
Dependent Claim
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The emulsion of claim 1 wherein said silver halide is selected from the group consisting of silver iodobromide, silver bromide, silver chlorobromide and silver chloride.
Claim 5
Dependent Claim
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The photographic silver halide emulsion as claimed in claim 1, wherein the concentration of said sensitizing dye is 0.002-0.2 g. per gram molecule of the silver halide.
Claim 6
Dependent Claim
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The photographic silver halide emulsion as claimed in claim 1, wherein the concentration of said compound represented by the general formula II is 0.02- 10 g. per gram molecule of the silver halide.
Claim 7
Dependent Claim
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The photographic silver halide emulsion as claimed in claim 1, wherein the concentration ratio of said sensitizing dye of formula I to said compound represented by the general formula II is from 1:2 to 1:200.