Silver halide photographic light-sensitive material
AssigneeFuji Photo Film Co., Ltd.
InventorsHiroyuki Suzuki, Hirotomo Sasaki
Life of this patent
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Abstract
A silver halide emulsion is disclosed, comprising at least one monovalent Au(I) complex coordinated with a compound represented by the following formula (1): R1—Ch—R2 (1) wherein R1 and R2 each independently represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group, R1 and R2 may combine with each other to form a 3-, 4-, 5-, 6- or 7-membered ring, and Ch represents a sulfur atom, a selenium atom or a tellurium atom.
Claims20
A method for preparing a gold sulfide colloid comprising reacting a solution of an Au(I) complex represented by formula (2) with a solution containing a sulfur compound in a protective colloid solution:
- [L1-Au(I)-(L2)m]Xn (2)
- wherein L1 represents a compound represented by formula (1), L2 represents a compound represented by formula (1) or a halogen atom, provided that L1 and L2 may be the same or different or may be combined, X represents a counter salt necessary for neutralizing the electric charge of the compound, m represents 0 or 1, and n represents a value of 0 to 1 and may be a decimal;
- R1—Ch—R2 (1)
- wherein R1 and R2 each independently represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group, R1 and R2 may combine with each other to form a 3-, 4-, 5-, 6- or 7-membered ring, and Ch represents a sulfur atom, a selenium atom or a tellurium atom.
A method of chemically sensitizing a silver halide emulsion, which comprises:
- (a) preparing a gold sulfide colloid by reacting a solution of an Au(I) complex represented by formula (2) with a solution containing a sulfur compound in a protective colloid solution:
- [L1-Au(I)-(L2)m]Xn (2)
- wherein L1 represents a compound represented by formula (1), L2 represents a compound represented by formula (1) or a halogen atom, provided that L1 and L2 may be the same or different or may be combined, X represents a counter salt necessary for neutralizing the electric charge of the compound, m represents 0 or 1, and n represents a value of 0 to 1 and may be a decimal;
- R1—Ch—R2 (1)
- wherein R1 and R2 each independently represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group, R1 and R2 may combine with each other to form a 3-, 4-, 5-, 6- or 7-membered ring, and Ch represents a sulfur atom, a selenium atom or a tellurium atom;
- and
- (b) chemically sensitizing a silver halide emulsion using the gold sulfide colloid.
Dependencies are inferred from the claim text.