| 摘要 |
A photographic material comprising a support and at least one layer which comprises at least one spectrally sensitised silver halide emulsion, characterised in that the material contains at least one compound of formulaand/orwhereinR1 denotes H, alkyl, aryl, aralkyl, alkenyl, heterocyclyl,R2 denotes OH, NH2, NHR7, NR8R9 orR1 together with R2, denotes the atoms necessary for the completion of a heteroaliphatic ring,R3 denotes OH, NH2, NHR7, NR8R9,R4 denotes H, alkyl, aryl, aralkyl, alkenyl, heterocyclyl,R5, R6 independently of each other, denote OH, NH2, NHR10, NR11R12, orR4 together with R5, or R4 together with R6, denote the atoms necessary for the completion of a heteroaliphatic ring, and the R5 or R6 radical, which is not part of a ring, denotes OH, NH2, NHR10 or NR11R12,R7, R10 denote alkyl, aryl, aralkyl, heterocyclyl,R8, R9 independently of each other, denote alkyl, aryl, aralkyl, heterocyclyl, orR8 together with R9, denotes the atoms necessary for the completion of a heteroaliphatic ring, andR11, R12 independently of each other, denote alkyl, aryl, aralkyl, heterocyclyl, orR11 together with R12, denote the atoms necessary for the completion of a heterocyclic ring, andwherein only one of the radicals R2 and R3 and only one of the radicals R5 and R6 can denote OH or NH2,is distinguished by increased spectral sensitivity, a high sensitivity/fogging ratio and a good shelf life under humid conditions.
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