| 摘要 |
<p>PHOTOGRAPHIC ELEMENTS AND PROCESSES UTILIZING IMAGEWISE REDUCTION OF FERRIC IONS A process for obtaining highly stable color photographic images utilizes a silver halide photographic element comprising an essentially colorless, immobile compound which is capable of complexing with ferrous ions to form a dye. The complexing compound contains a complexing moiety which is represented by the formula: wherein m is zero or a positive integer 1 to 3, n and p are independently 0 or 1 and -- represents a single or double bond. Z is R1-N=, O-, S=, R1-P=, (R1)2P- or (R1)3P=, and when Z is (R1)2P-, n is 1, otherwise n is 0. R1, R2, R3, R4, R5 and R6 are independently hydrogen, amino, hydroxy, mercapto, alkoxy, alkyl, aryl or a heterocyclic moiety. When R6 is so defined, p is 1 and -- is a single bond. If m is 0, R1 and R2, R2 and R3, and R3 and R4 taken together can independently represent the carbon and heteroatoms necessary to complete a substituted or unsubstituted carbocyclic or heterocyclic nucleus, or if m is 1 to 3, R1 and R2, R5 and R6, and R3 and R4 can independently represent the carbon and heteroatoms necessary to complete a substituted or unsubstituted heterocyclic nucleus. When R5 and R6 are so defined, p is 0 when -- is a double bond, and p is 1 when -- is a single bond.</p> |
