Formazan metal complex
AssigneeKabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo
InventorsKentaro Yano, Katsumi Orita, Toshio Kawata, Shigeo Yasui
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Abstract
The present invention provides organic compounds which improve the light resistance of organic dye compounds without substantially deteriorating their preferable light properties when applied to them, and have satisfactory solubility in organic solvents and compatibility with organic dye compounds. The object of the present invention is solved by formazan metal compounds which comprise specific formazan compounds as ligands; process thereof; light-resistant improvers, optical recording media, and light absorbents, which all comprise the formazan metal complexes; and formazan compounds as intermediates for producing the formazan metal complexes
Claims11
A formazan compound represented by Formula 1 or a tautomer thereof:
- Formula 1:
- wherein Formula 1, Φ1 represents a pyridine ring which has a substituent;
- Φ2 represents a pyridine ring, furan ring or branched alkyl group, said pyridine ring and said furan ring optionally have a substituent;
- and Φ3 represents an aromatic ring which optionally has a substituent.
A formazane metal complex, which has solubility of at least 2 mg/ml in ethyl cellosolve at 20° C. and comprises as a ligand (Fz) a formazan compound represented by Formula 1 or a tautomer thereof:
- Formula 1:
- wherein Φ1 in Formula 1 represents a pyridine ring which has a substituent;
- Φ2 in Formula 1 represents a pyridine ring, furan ring or branched alkyl group, said pyridine ring and said furan ring optionally have a substituent;
- and Φ3 in Formula 1 represents an aromatic ring which optionally has a substituent.
Dependencies are inferred from the claim text.