Patent ID: 6472134
Filing Date: 2002-10-29
Classification: G03C

Abstract:
A silver halide photographic element comprising at least one silver halide emulsion, said silver halide element further comprising an amido compound represented by Formula 1wherein INH is a development inhibitor;LINK is a linking or timing group and m is 0, 1 or 2; and R1 and R2 independently represents an aliphatic, aromatic or heterocyclic group, or R1 and R2 together with the nitrogen to which they are attached represent the atoms necessary to form a 5 or 6 membered ring or multiple ring system; or R1 and R2 are independently a â€”C(&boxH;O)(LINK)mâ€”INH group, or are substituted with an â€”NR3aC(&boxH;O)â€”(LINK)mâ€”INH group, with R3a being defined the same as R1 or R2, and wherein the compound of Formula I does not substantially react with oxidized developer to release INH; and a fragmentable electron donor compound of the formula Xâ€”Yâ€² or a compound which contains a moiety of the formula â€”Xâ€”Yâ€²; â€ƒwherein X is an electron donor moiety, Yâ€² is a leaving proton H or a leaving group Y, with the proviso that if Yâ€² is a proton, a base, &bgr;âˆ’, is covalently linked directly or indirectly to X, and wherein: 1) Xâ€”Yâ€² has an oxidation potential between 0 and about 1.4 V; and 2) the oxidized form of Xâ€”Yâ€² undergoes a bond cleavage reaction to give the radical Xâ€¢ and the leaving fragment Yâ€², and optionally, 3) the radical Xâ€² has an oxidation potential &lE;âˆ’0.7V.