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Home Quantum Computing Method-for-stabilizing-organic-substrate-materials-including-photographic-dye-images-against-light

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 Method for stabilizing organic substrate materials including photographic dye images against light

Details
Inventors: Hara, Hiroshi; Nakamura, Kotaro; Suzuki, Yoshiaki;
Assignee: Fuji Photo Film Co., Ltd. (Minami-ashigara, JP)
Primary Examiner: Brown; Travis
Assistant Examiner:
Attorney, Agent or Firm: Sughrue, Rothwell, Mion, Zinn and Macpeak

Organic substrates, especially photographic dyes, are stabilized against light by using a Cu, Co, Ni, Pd or Pt complex of formula (I). ##STR1## wherein M represents Cu, Co, Ni, Pd or Pt; R.sub.1 and R.sub.6 may be the same or different and represent a hydrogen atom or an alkyl group, an aryl group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonyl group or an arylsulfonyl group; and R.sub.2, R.sub.3, R.sub.4 and R.sub.5 which may be the same or different represent a hydrogen atom, a halogen atom, a cyano group, or an alkyl group, an aryl group, a cycloalkyl group or a heterocyclic group bonded to a carbon atom on a benzene ring directly or through a divalent linking group, or R.sub.2 and R.sub.3, R.sub.3 and R.sub.4 or R.sub.4 and R.sub.5 respectively may combine and represent the non-metallic atomic groupings required to form a 6-membered ring.

DETAILED DESCRIPTION What we claim is: 1.
A method for stabilizing photographically useful organic substrate against light, said organic substrate being selected from the group consisting of anthraquinone dyes, quinoneimine dyes, azoic dyes, methine dyes, polymethine dyes, indoamine dyes, indigoid dyes, indophenol dyes, carbonium dyes and formazan dyes, which comprises causing an organic substrate substance having an absorption maximum in the range of about 300 nm to about 800 nm to be present together with at least one complex of the formula ##STR13## wherein M represents a Cu, Co, Ni, Pd or Pt atom, R.
sub.
1 and R.
sub.
6 are the same or different, and represent a hydrogen atom or an alkyl group, an aryl group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonyl group, or an arylsulfonyl group; R.
sub.
2, R.
sub.
3, R.
sub.
4 and R.
sub.
5 which may be the same or different represent a hydrogen atom, a halogen atom, a cyano group, or an alkyl group, an aryl group, a cycloalkyl group or a heterocyclic group bonded to a carbon atom on the benzene rings either directly or through a divalent linking group, or R.
sub.
2 and R.
sub.
3, R.
sub.
3 and R.
sub.
4 or R.
sub.
4 and R.
sub.
5 may combine to form the non-metallic atomic groupings necessary to form a 6-membered ring, said compound of the formula (I) being present in a stabilizing amount which does not adversely affect color hue as well as color purity of the photographically useful organic substrate material.
2.
The method of claim 1 wherein the complex is represented by the following formula ##STR14## wherein R.
sub.
7 represents a hydrogen atom or an alkyl group, an aryl group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonyl group, or an arylsulfonyl group; and R.
sub.
8 represents a hydrogen atom, a halogen atom, a cyano group, or an alkyl group, an aryl group, a cycloalkyl group, or a heterocyclic group bonded to a carbon atom on the benzene ring either directly or through a divalent linking group



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