JP2004004456A5 - - Google Patents

Claims (6)

A silver halide emulsion characterized by being chemically sensitized with a compound that releases AuCh ^- ions in the presence of a compound having a complex stability constant logβ ₂ with Au (I) of 21 or more and 35 or less. However, Ch represents S, Se, or Te. The compound that releases Au ^I Ch ⁻ ions in claim 1 is selected from compounds represented by the following general formula ( AUS1) , general formula ( AUS2) , general formula ( AUS3) , and general formula ( AUS4 ): The silver halide emulsion according to claim 1.
[0010]

[0011]
Wherein, Ch represents S atom, Se atom or Te atom, L ¹ represents a N atom, S atom, Se atom, capable of coordinating compounds to gold through the Te atom or P atom. n represents 0 or 1. A ¹ represents O, S or NR ⁴ , and R ^{1 to} R ⁴ represent a hydrogen atom or a substituent. R ³ may form a 5- to 7-membered ring with R ¹ or R ² . X ¹ represents O, S or NR ⁵ . Y ¹ represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group, OR ⁶ , SR ⁷ , N (R ⁸ ) R ⁹ . R ^{5 to} R ⁹ each represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group. X ¹ and Y ¹ may be bonded to each other to form a ring. R ¹⁰ , R ^{10 ′} and R ¹¹ each independently represent a hydrogen atom or a substituent, and at least one of R ¹⁰ and R ^{10 ′} represents an electron withdrawing group. W ¹ represents an electron withdrawing group, and R ^{12 to} R ¹⁴ each represents a hydrogen atom or a substituent. W ¹ and R ¹² may be bonded to each other to form a cyclic structure. Above Au (I) Complex stability constant with log β ₂ The silver halide emulsion according to claim 1 or 2, wherein the compound having an A of 21 to 35 is a mesoionic compound. The silver halide emulsion according to any one of claims 1 to 3, wherein the silver chloride content is 90 mol% or more. 5. The silver halide emulsion according to claim 4, comprising an iridium complex having a thiazole compound as a ligand. In the silver halide color photographic light-sensitive material having at least one blue-sensitive silver halide emulsion layer, green-sensitive silver halide emulsion layer, and red-sensitive silver halide emulsion layer, respectively, on the support, the blue-sensitive silver halide emulsion 6. A silver halide color photographic light-sensitive material containing at least one of a layer, a green-sensitive silver halide emulsion layer, and a red-sensitive silver halide emulsion layer containing the emulsion according to any one of claims 1 to 5 An image forming method comprising: performing development after scanning exposure with an exposure time per pixel of 10 ⁻⁴ seconds or less using a laser beam modulated based on the above.