Metal complex for use as light absorber in optical data carriers, e.g. DVD's, has azo ligands with a 5-membered heteroaromatic ring on one side and an N-sulfonamido m-phenylenediamine residue on the other

• Main Authors: BRUDER, FRIEDRICH, STAWITZ, JOSEF-WALTER, BERNETH, HORST, KRUEGER, CHRISTA-MARIA, HAGEN, RAINER, MEYER-FRIEDRICHSEN, TIMO, HASSENRUECK, KARIN, ENGEL, MONIKA, KOSTROMINE, SERGUEI, OSER, RAFAEL
• Format: Patent
• Language: English; German
• Published: 26.08.2004
• Edition: 7
• Subjects: ADHESIVES; CHEMISTRY; DYES; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; LAKES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MORDANTS; NATURAL RESINS; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; PAINTS; PHYSICS; POLISHES

Metal complexes with at least one tridentate ligand comprising an azo compound with a 5-membered quasi-aromatic heterocycle attached to one azo nitrogen atom and an N-sulfonamido-derivatized m-phenylenediamine residue attached to the other. Metal complexes (Ia) with at least one ligand of formula (I); [Image] D : a 5-membered, quasi-aromatic heterocyclic residue, other than optionally substituted thiazol-2-yl, benzthiazol-2-yl, benzoxazol-2-yl, benzimidazol-2-yl or 1,3,4-triazol-2-yl when x is 1 and R 2>is optionally substituted 6-10C aryl; x : 0 or 1; R 2>6-10C aryl, (6-10C aryl)-vinyl, (6-10C aryl)-ethynyl, (6-10C aryl)-butadienyl or a 5- or 6-membered aromatic or quasi-aromatic heterocyclic residue (all optionally substituted); R 3>, R 4>1-6C alkyl, 7-10C aralkyl or 6-10C aryl (all optionally substituted), or NR 3>R 4>may be a pyrrolidino, piperidino, morpholino, piperazino or N-(1-6C alkyl)-piperidino group; R 5>H, Cl, methyl or methoxy, or R 3>and R 5>together may form a -(CH 2) 2-, -(CH 2) 3- or -(CH 2) 2O- bridge. Independent claims are also included for: (1) azo compounds of formula (Ib); (2) a method for the production of (Ia) by reacting metal salts with (Ib); (3) coupling components of formula (VII); (4) a method (M1) for the production of (VII) by reacting corresponding m-phenylenediamines with sulfonic or sulfinic acid halides of formula Z-S(R 2>)(O)(O) x(IX); (5) solutions containing at least 1 wt.% (Ia) in 2,2,3,3-tetra-fluoropropanol, propanol, butanol, pentanol, hexanol, diacetone alcohol, dibutyl ether and/or heptanone; (6) optical data carriers which can be written and read with blue or red light (preferably laser light), in which (Ia) are used as light-absorbing compounds in the information layer; and (7) a method (M2) for the production of optical data carriers as above by coating a preferably transparent substrate (optionally already coated with a reflective layer) with (Ia) (optionally in combination with binders, additives and solvents) and then optionally adding a reflective layer, other interlayers, protective layers, further substrates and/or covering layers [Image] Z : F, Cl, Br or I. Optischer Datenträger, enthaltend ein vorzugsweise transparentes gegebenenfalls schon mit einer oder mehreren Reflexionsschichten beschichtetes Substrat, auf dessen Oberfläche eine mit Licht beschreibbare Informationsschicht, gegebenenfalls eine oder mehrere Reflexionsschichten und gegebenenfalls eine Schutzschicht oder ein weiteres Substrat oder eine Abdeckschicht aufgebracht sind, der mit blauem, rotem oder infrarotem Licht, vorzugsweise Laserlicht, beschrieben und gelesen werden kann, wobei die Informationsschicht eine lichtabsorbierende Verbindung und gegebenenfalls ein Bindemittel enthält, dadurch gekennzeichnet, dass als lichtabsorbierende Verbindung wenigstens ein Azometallfarbstoff verwendet wird.