Photothermographic material

A photothermographic material comprising at least one photosensitive layer, which comprises an organic silver salt, a silver halide, a reducing agent, a hydrazine derivative of the following formula (H):

• wherein
• R01 is an aromatic or heterocyclic group;
• R02 is an alkyl, aryl, heterocyclic, alkoxy, aryloxy, amino or hydrazino group when G01 is —CO—, and R02 is a hydrogen atom, alkyl, aryl, heterocyclic, alkoxy, aryloxy, amino or hydrazino when G01 is —SO2—, —SO—, —P(═O)(—R03)—, —CO—CO—, thiocarbonyl or iminomethylene group;
• A01 and A02 are both hydrogen atoms, or one of A01 and A02 is a hydrogen atom and the other is a substituted or unsubstituted alkylsulfonyl, arylsulfonyl or acyl group;
• and R03 is a group selected from the same range as defined for R02 and may be identical with or different from R02, and a sensitizing dye of the following formula (D-II) or (D-III):
• wherein each of R51′ and R52′, which may be identical or different, is an alkyl group;
• R53′ and R54′, each are a hydrogen atom, lower alkyl, lower alkoxy, phenyl, benzyl, or phenethyl group;
• R55′ and R56′, each are a hydrogen atom or R55′ and R56′, taken together, form a divalent alkylene group;
• R57′ is a hydrogen atom, lower alkyl, lower alkoxy, phenyl, benzyl or —N(W1′)(W2′) group wherein W1′ and W2′ are independently selected from alkyl and aryl groups, or W1′ and W2′, taken together, may form a five- or six-membered nitrogenous heterocycle;
• or R53′ and R57′ or R54′ and R57′, taken together, may form a divalent alkylene group;
• each of Z′ and Z1′ is a group of non-metallic atoms necessary to complete a 5- or 6-membered nitrogenous heterocycle;
• X1′ is an acid anion;
• and letter m′ is equal to 1 or 2 with the proviso that m′ is 1 when the dye forms an intramolecular salt,
• wherein R61 is an alkyl group;
• Z is a group of atoms necessary to complete a five- or six-membered nitrogenous heterocycle;
• each of D and Da is a group of atoms necessary to form a cyclic or acyclic acidic nucleus;
• each of L1, L2, L3, L4, L5 and L6 is a methine group;
• M1 is an electric charge balancing counter ion;
• m1 is a number necessary to neutralize the electric charge in a molecule;
• and n is 0 or 1.

A photothermographic material comprising at least one photosensitive layer, which comprises an organic silver salt, a silver halide, a reducing agent, a hydrazine derivative of the following formula (H):

• wherein
• R01 is an aromatic or heterocyclic group;
• R02 is an alkyl, aryl heterocyclic, alkoxy, aryloxy, amino or hydrazino group, when G01 is —CO—, and R02 is a hydrogen atom, alkyl, aryl, heterocyclic, alkoxy, aryloxy, amino or hydrazino group when G01 is —SO2—, —SO—, —P(═O)(—R03)—, —CO—CO—, thiocarbonyl or iminomethylene group;
• A01 and A02 are both hydrogen atoms, or one of A01 and A02 is a hydrogen atom and the other is a substituted or unsubstituted alkylsulfonyl, arylsulfonyl or acyl group;
• and
• R03 is a group selected from the same range as defined for R02 and may be identical with or different from R02, and a sensitizing dye of the following formula (D-IV) or (D-V) or (D-VI):
• A represents
• wherein each of Z10 and Z11 is a group of non-metallic atoms necessary to complete a five- or six-membered nitrogenous heterocyclic nucleus;
• each of R70 and R71 is an alkyl, substituted alkyl or aryl group;
• Q and Q1, taken together, are a group of non-metallic atoms necessary to complete a 4-thiazolidinone, 5-thiazolidinone or 4-imidazolidinone nucleus;
• each of L, L1, L2, L3, and L4 is a substituted or unsubstituted methine group, or L and L2, or L1 and L3 may form a five- or six-membered ring;
• n1 and n2 each are 0 or 1;
• X is an anion;
• m is 0 or 1, with the proviso that m is 0 when the dye forms an intramolecular salt;
• wherein each of Y1 and Y2 is a group of non-metallic atoms necessary to complete a five- or six-membered nitrogenous heterocyclic nucleus which may have a substituent;
• each of R81 and R82, which may be identical or different, is a substituted or unsubstituted lower alkyl group;
• R83 is a hydrogen atom, lower alkyl, lower alkoxy, phenyl, benzyl or phenethyl group;
• X1 is an acid anion;
• n1 and n2 each are 0 or 1;
• and m1 is 0 or 1, with the proviso that m1 is 0 when the dye forms an intramolecular salt;
• wherein Y1, Y2 and Y3 are independently a group —N—(R90)—, oxygen, sulfur or selenium atom;
• each of R90, R91, R92 and R93 is an aliphatic, aryl or heterocyclic group;
• each of V1 and V2 is a hydrogen atom, alkyl, alkoxy or aryl group, or V1 and V2, taken together, may form a fused ring with the azole ring;
• each of L1, L2, L3, and L4 is a substituted or unsubstituted methine group;
• n is 1 or 2;
• m is 0 or 1;
• M1 is an electric charge balancing counter ion;
• and n1 is a number necessary to neutralize the electric charge in a molecule.