Silver halide emulsion and silver halide photographic light-sensitive material
View Patent ↗A silver halide emulsion chemically sensitized by a compound of formula (1), (6-1), (6-2) or (7); and a silver halide photographic light-sensitive material containing the silver halide emulsion: Formula (1) E 1 -Ch-E 2 Formula (6-1) W 1 . . . AuX 2 m Formula (6-2) [W 1 . . . Au . . . W 2 ]X 2 m Formula (7) E 5 -Ch-Au . . . (L 2 ) 1 wherein Ch is a sulfur, selenium or tellurium atom; E 1 , E 2 , and E 5 each are, for example, a specific methylene group having a substituent; Au is a monovalent or trivalent gold ion; W 1 and W 2 each are a specific chalcogen compound; X 2 is a monovalent anion; m is 1, 2 or 3; L 2 is a compound that can coordinate with gold through a nitrogen, sulfur, selenium, tellurium or phosphorous atom; and l is 0, 1, 2 or 3.
1. A silver halide emulsion, which is chemically sensitized by a compound represented by formula (1):
E 1 -Ch-E 2 Formula (1)
wherein, in formula (1), Ch represents a sulfur atom, a selenium atom or a tellurium atom; E 1 is a group selected from groups represented by formula (3), (4) or (5); and E 2 is a group selected from groups represented by formula (5);
wherein, in formula (3), L 1 represents an aliphatic group having 2 to 20 carbon atoms; and EWG represents an electron withdrawing group;
wherein, in formula (4), A 1 represents an oxygen atom, a sulfur atom or NR 7 ; and R 4 , R 5 , R 6 and R 7 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group; or R 4 and R 5 , R 4 and R 6 , or R 4 and R 7 may bond together to form a ring;
wherein, in formula (5), A 2 represents an oxygen atom, a sulfur atom, or NR 11 ; R 8 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group, or an acyl group; R 9 , R 10 , and R 11 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group; X 1 represents a substituent; and n is an integer from 0 to 4; when n is 2 or more, X 1 s may be the same or different; and
wherein when E 1 and E 2 each represent a group represented by the same formula, E 1 and E 2 may be the same or different.
2. The silver halide emulsion according to claim 1 , wherein, in formula (1), Ch is a selenium atom or a tellurium atom.
3. The silver halide emulsion according to claim 1 , wherein, in formula (1), Ch is a selenium atom.
4. The silver halide emulsion according to claim 1 , wherein, in formula (1), E 1 is a group selected from groups represented by formula (4) or (5).
5. The silver halide emulsion according to claim 1 , wherein, in formula (1), E 1 is a group selected from groups represented by formula (5).
6. The silver halide emulsion according to claim 1 , wherein, in formula (3), the divalent linking group represented by L 1 is represented by formula (LA) or (LB):
in which, in formulae (LA) and (LB), G 1 , G 2 , G 3 and G 4 each independently represent a hydrogen atom, an alkyl group, an aryl group, or a heterocyclic group; G 1 and G 2 , or G 2 and G 3 may bond together to form a ring; or EWG and any of G 1 to G 3 may bond together to form a ring.
7. A silver halide photographic light-sensitive material, comprising:
at least one silver halide emulsion layer on a support,
wherein at least one layer of said at least one silver halide emulsion layer contains the silver halide emulsion according to claim 1 .
8. A method of chemically sensitizing a silver halide emulsion, comprising:
using at least one compound represented by formula (1):
E 1 -Ch-E 2 Formula (1)
wherein, in formula (1), Ch represents a sulfur atom, a selenium atom or a tellurium atom; E 1 is a group selected from groups represented by formula (3), (4) or (5); and E 2 is a group selected from groups represented by formula (5);
wherein, in formula (3), L 1 represents an aliphatic group having 2 to 20 carbon atoms; and EWG represents an electron withdrawing group;
wherein, in formula (4), A 1 represents an oxygen atom, a sulfur atom or NR 7 ; and R 4 , R 5 , R 6 and R 7 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group; or R 4 and R 5 , R 4 and R 6 , or R 4 and R 7 may bond together to form a ring;
wherein, in formula (5), A 2 represents an oxygen atom, a sulfur atom, or NR 11 ; R 8 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group, or an acyl group; R 9 , R 10 , and R 11 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group; X 1 represents a substituent; and n is an integer from 0 to 4; when n is 2 or more, X 1 s may be the same or different; and
wherein when E 1 and F 2 each represent a group represented by the same formula, E 1 and E 2 may be the same or different.
9. The silver halide emulsion according to claim 1 , wherein, in formula (5), R 8 is an alkyl group.
10. The silver halide emulsion according to claim 1 , wherein, in formula (5), n is 0.
11. The silver halide emulsion according to claim 1 , wherein, in formula (5), A 2 is an oxygen atom.