Tetraazaporphyrins and optical recording medium

An optical recording medium contains tetraazaporphyrins of the formula where L1, L2, L3 and L4 are each independently of the others the radical of a bicyclic aromatic heterocycle containing 1 to 3 identical or different heteroatoms selected from the group consisting of N, O and S, which may be subst...

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Bibliographische Detailangaben
Hauptverfasser:	ALBERT, BERNHARD, KOHLER, ROLF-DIETER, NEUMANN, PETER
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM ADHESIVES CHEMISTRY CINEMATOGRAPHY COLOUR PRINTING DYES ELECTROGRAPHY ELECTROPHOTOGRAPHY HETEROCYCLIC COMPOUNDS HOLOGRAPHY INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER LAKES LINING MACHINES MAGNETOGRAPHY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC CHEMISTRY ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS PERFORMING OPERATIONS PHOTOGRAPHY PHYSICS POLISHES PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	An optical recording medium contains tetraazaporphyrins of the formula where L1, L2, L3 and L4 are each independently of the others the radical of a bicyclic aromatic heterocycle containing 1 to 3 identical or different heteroatoms selected from the group consisting of N, O and S, which may be substituted, and R1 and R2 have defined meanings.