Scannable photographic element containing high extinction high-dye-yield cyan couplers
AssigneeEastman Kodak Company
InventorsJared B. Mooberry, Wojciech K. Slusarek, David T. Southby, David H. Levy, Xiqiang Yang
Life of this patent
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Abstract
A color photographic element comprising at least three light-sensitive units which have their individual sensitivities in different wavelength regions, at least one of units comprising a light-sensitive silver-halide emulsion, binder, and a coupler represented by formula I: COUP—(T)m—L—DYE′ (I) wherein COUP is a coupler parent group capable of reacting with an oxidized developer to form a first cyan dye and is bonded at a coupling position to a releasable group that forms a second dye of the same hue, as described in the specification.
Claims26
A photographic element containing a light-sensitive silver-halide emulsion layer having associated therewith a coupler represented by Formula I:
- COUP-(T)m—L-DYE′ (I)
- wherein
- COUP is a photographic coupler residue capable of coupling with oxidized color developer to form a first cyan dye;
- T is a timing group;
- m is an integer from 0 to 2;
- L is a linking group selected from the group consisting of —OC(═O)—, —OC(═S)—, —SC(═O)—, and —SC(═S)—, wherein T, when m is not 0, or L, when m is 0, is attached to the coupling site of COUP;
- and
- DYE′ is group that, upon release from the coupling site, forms a second dye, or dye precursor that is converted to a second dye, which second dye is also cyan colored, which DYE′ group is represented by the following formula:
- wherein
- R2 and R3 are independently organic or inorganic substituents, or a plurality of R2 and/or a plurality of R3 groups can form a saturated, unsaturated, or aromatic carbocyclic or heterocylic ring, the R2 and R3 substituents, and any rings formed thereby, being selected so that the second dye absorbs light predominantly in the range of 600 to 700 nm;
- n and p are independently an integer from 0 to 4;
- and
- Q is O, S, or NR′ where R′ is H or a substituted or unsubstituted alkyl or aryl group.
A photographic element containing a light-sensitive silver-halide emulsion layer having associated therewith a coupler represented by the following formula:
- wherein
- COUP is a coupler parent group capable of reacting with an oxidized developer to form a first cyan dye;
- T is a timing group;
- m is an integer from 0 to 2;
- L is a linking group selected from the group consisting of —OC(═O)—, —OC(═S)—, —SC(═O)—, and —SC(═S)— wherein T, when m is not 0, or L, when m is 0, is attached to the coupling site of COUP;
- R2 and R3 are independently selected from the group consisting of substituted or unsubstituted alkyl, aryl, alkoxy, hydroxy, amino, alkylamino, dialkylamino, and acetamido groups having 1 to 10 carbon atoms, and wherein a plurality of R2 and R3 groups can form a saturated, unsaturated, or aromatic carbocyclic or heterocyclic ring;
- n and p are independently an integer from 1 to 4;
- and
- Q is O, S, or NR′ where R′ is H or a substituted or unsubstituted alkyl or aryl group.
A method of image formation comprising the step of developing an imagewise exposed photographic element comprising at least three light-sensitive units which have their individual sensitivities in different wavelength regions, each of the units comprising at least one light-sensitive silver-halide emulsion, binder, and dye-providing coupler, which coupler is represented by the following formula:
- COUP-(T)m—L-DYE′ (I)
- wherein
- COUP is a photographic coupler residue capable of coupling with oxidized color developer to form a first cyan dye;
- T is a timing group;
- m is an integer from 0 to 2;
- L is a linking group selected from the group consisting of —OC(═O)—, —OC(═S)—, —SC(═O)—, and —SC(═S)— wherein T, when m is not 0, or L, when m is 0, is attached to the coupling site of COUP;
- and
- wherein DYE′ is a releasable group that upon release forms a second dye, or dye precursor that is converted to a second dye, which second dye also exhibits a cyan color, wherein DYE′ is represented by the following formula:
- wherein
- R2 and R3 are independently selected organic or inorganic substituents, and wherein a plurality of R2 and R3 groups can form a saturated, unsaturated, or aromatic heterocyclic or carbocyclic ring;
- n and p are independently an integer from 0 to 4;
- and
- Q is O, S, or NR′ where R′ is H or a substituted or unsubstituted alkyl or aryl group.
Dependencies are inferred from the claim text.