摘要:
A ballasted non-diffusing compound that is capable of releasing a diffusible particularly light-fast azo dye from a carrier moiety, characterized in that said compound corresponds to the following general formula:CAR--L--G--Dwherein:CAR represents a ballasted carrier moiety making said compound non-diffusing in a hydrophilic colloid medium under wet alkaline conditions,L represents a chemical group cleavable or releasable from the carrier moiety as a function of a redox-reaction or argentolytic reaction taking place in the development of a silver halide emulsion layer under alkaline conditions;G represents a bivalent organic group containing at least one aromatic nucleus being substituted with a R.sup.5 R.sup.6 NSO.sub.2 NH-group, wherein R.sup.5 and R.sup.6 (same or different) represent hydrogen, an alkyl group including a substituted alkyl group or an aryl group including a substituted aryl group, andD is an azo dye part chemically linked to an aromatic nucleus of G.
摘要:
Photographic silver halide emulsion material for use in a dye diffusion transfer process incorporating a non-diffusing compound capable of releasing a diffusible mono-azo dye or dye precursor thereof from a carrier moiety, said compound corresponding to the following general formula (I):(I) CAR--L--G--Dwherein:CAR represents a ballasted carrier moiety,L represents a chemical group cleavable or releasable from the carrier moiety as a function of a redox-reaction or argentolytic reaction taking place in the development of a silver halide emulsion layer under alkaline conditions,G represents a bivalent organic group incorporating at least three aromatic nuclei, selected from the group consisting of homocyclic or heterocyclic aromatic nuclei, with the provisions that L is linked to one end nucleus and that D is linked to the other end nucleus of said bivalent organic group; said linking being by means of a direct bond or by means of a bivalent mono- or polyatomic group, andD is an azo dye part linked to said other end aromatic nucleus of G.
摘要:
A photographic silver halide material comprises a shifted dye compound capable of releasing a dye moiety, characterized in that said compound corresponds in reduced state to general formula (1) and in oxidized state to general formula (2):A.sup.1 --L--P (1)A.sup.2 --L--P (2)wherein:A.sup.1 represents a hydroquinonyl group including a substituted hydroquinonyl group, or such group forming part of a fused ring system,A.sup.2 represents a quinonyl group including a substituted quinonyl group, or such group forming part of a fused ring system,L represents a bivalent group which undergoes a cleavage under hydrolytic alkaline conditions when the compound is in reduced state corresponding to formula (1),P represents an organic dye moiety incorporating an azo chromophoric group --N.dbd.N-- linked through a conjugated bond system to an electron-withdrawing group being monoester oxalyl group ##STR1## wherein R represents an organic group, that can be introduced by esterification of a carboxylic acid group, said monoester oxalyl group being removable by hydrolysis resulting in a residual auxochromic hydroxyl (--OH) group.
摘要:
1. A photographic silver halide emulsion material which contains in operative contact with at least one alkali-permeable silver halide hydrophilic colloid emulsion layer a ballasted non-diffusing compound capable of releasing a diffusible dye or dye precursor corresponding to the following general formula:CAR--L--Dwherein:CAR represents a carrier moiety,L represents a chemical group cleavable or releasable from the carrier moiety by a redox-reaction in alkaline aqueous medium, andD represents a dye or dye precursor part containing:(i) several dye units or dye precursor units that are linked chemically to each other by:a non-metal atom bearing only single bonds,a polyvalent atom group wherein one atom links the dye units together by single bonds only, ora polyvalent atom group forming between the dye units a chain of atoms wherein at least one atom of the interlinking atoms of the backbone part of said chain has two consecutive single bonds in said backbone part, and(ii) incorporating one or more groups that improve the diffusibility of the released dye part or dye precursor part in a hydrophilic colloid medium when permeated by an aqueous alkaline liquid.