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O-Nitro-o-azaarylidene-photobleachable-dyes-and-photographic-elements-utilizing-them

3- and 4-Azidophthalic acid derivatives

What is claimed is: 1. A compound of formula Ib ##STR33## in which Y is alkylene having 2 to 18 ...

Phenoxypyridine derivatives

OF THE PREFERRED EMBODIMENTS The inventors have studied and found that novel phenylcyclopropane ...

Method of stabilizing organic substrate materials including photographic dye images to light and a photographic material so stabilized

OF THE INVENTION The above-described objects and other objects of the present invention are ...

Light sensitive jet inks

What is claimed is: 1. A process for information recording comprising producing a fine jet of ...

Color developing ink containing aliphatic esters with 8-25 carbon atoms

OF THE INVENTION Phenol resins suitable for use in the color developing ink of the present ...

Derivatives of aryl ketones based on 9,10-dihydro-9,10-ethanoanthracene and p-dialkyl-aminoaryl aldehydes as visible sensitizers for photopolymerizable compositions

I claim: The embodiments of the invention in which an exclusive property or privilege is claimed ...

Method of stabilizing organic substrate materials including photographic dye images to light and a photographic material so stabilized

OF THE INVENTION The above-described objects and other objects of the present invention are ...

Disperse dyeing of polyvinyl chloride-acetelized polyvinyl alcohol fibers

What we claim is: 1. A process for dyeing with a disperse dyestuff a fibrous substrate whose fibres ...

Photosensitive compositions

OF THE INVENTION The substituted phenyl group or the substituted naphthyl group preferably ...

UV Stabilizers, coating compositions and composite structures obtained therefrom

What I claim as new and desire to secure by Letters Patent of the United States is: 1. 2,4-...

O-Nitro-o-azaarylidene photobleachable dyes and photographic elements utilizing them

Details

Inventors: Krueger, Spencer Milton;
Assignee: Eastman Kodak Company (Rochester, NY)
Primary Examiner: Louie, Jr.; Won H.
Assistant Examiner:
Attorney, Agent or Firm: Levitt; J. G.

Novel o-nitro-o-azaarylidene dyes are provided in which the o-nitro-o-azaaryl group of the dye is joined through a methine linkage to a basic heterocyclic nucleus containing an electron donating atom. These dyes are photobleachable. The photobleachable properties of the dyes make them useful in a variety of photographic applications. For example, they can be used to provide light-sensitive elements in which images can be formed in or on a support by exposure to light to which the dye is sensitive; or to provide photobleachable halation protection in photographic, including photothermographic, elements having coated thereon a photosensitive imaging layer. The dyes are also useful in filter layers.

DETAILED DESCRIPTION What is claimed is: 1.
A photographic element comprising a support, a light sensitive layer and, incorporated in the support, in the light sensitive layer or in an otherwise non-light sensitive layer adjacent the support, a photobleachable o-nitro-o-azaarylidene dye having the structure: ##STR17## wherein: (a) k represents 0 or 1; (b) m represents 0 or 1; (c) each L represents a methine group; (d) A represents an electron donating moiety selected from oxygen, sulfur or ##STR18## wherein R.
sub.
1 represents an alkyl group, an alkenyl group or an aryl group; (e) Z.
sub.
1 represents the nonmetallic atoms necessary to complete a basic heterocyclic nucleus of the type used in cyanine dyes; and (f) Y represents the atoms necessary to complete a pyridine nucleus, a pyridazine nucleus, a pyrimidine nucleus, a pyrazine nucleus, a quinoline nucleus, a quinaldine nucleus or a quinoxaline nucleus.
2.
A photographic element of claim 1 wherein the photobleachable dye is in the light sensitive layer.
3.
A photographic element of claim 2 wherein the light sensitive layer comprises photosensitive silver halide.
4.
A photographic element of claim 1 wherein the photobleachable dye is in an otherwise non-light sensitive layer adjacent the support.
5.
A photographic element of claim 1 wherein the photobleachable dye is in an otherwise non-light sensitive layer between the support and the light sensitive layer.
6.
A photographic element of claim 1 wherein the photobleachable dye is in an otherwise transparent support.
7.
A photographic element of claim 6 in which said support is comprised of the photobleachable dye and a transparent polymer.
8.
A photographic element of claim 7 in which the photobleachable dye is homogeneously blended with the transparent polymer.
9.
A photographic element of claim 7 in which the support is comprised of cellulose acetate or poly(ethylene terephthalate).
10.
A photographic element of claim 6 wherein the light sensitive layer comprises photosensitive silver halide

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