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US5512428A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventor

• Michael Missfeldt · Leichlingen, DE

Key dates

• Filing date: Sep 28, 1994
• Grant date: Apr 30, 1996
• Expiry date: Sep 28, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C2001/03588
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Phenanthroazole cyanines and anthraazole cyanines, having not less than one acidic group, of the formula I are excellent spectral sensitizers. ##STR1## The symbols in formula I have the following meanings X.sub.1 and X.sub.2 O, S, Se or NR.sub.10 ; PA1 R.sub.1 and R.sub.2 or R.sub.2 and R.sub.3 residues of an optionally substituted phenanthroazole or anthraazole with the remaining group R.sub.3 or R.sub.1 signifying hydrogen; PA1 R.sub.4 and R.sub.6 hydrogen or together a .pi.-bond, PA1 R.sub.5 and R.sub.7 hydrogen, alkyl or aryl or PA1 R.sub.4,R.sub.5,R.sub.6 and R.sub.7 residues of an optionally substituted benzazole, naphthazole, phenanthroazole or anthraazole; PA1 R.sub.8, R.sub.9 alkyl, sulphoalkyl, carboxyalkyl, --(CH.sub.2).sub.m --CO--NR.sub.11 --SO.sub.2 --R.sub.12 or --(CH.sub.2).sub.m --SO.sub.2 --NR.sub.11 --CO--R.sub.12 ; PA1 R.sub.10 a residue as defined for R.sub.8 /R.sub.9 or aryl; PA1 R.sub.11 hydrogen or the negative charge (.sup..crclbar.) which remains when a proton is removed; PA1 R.sub.12 alkyl, aryl, --O.sup..crclbar., --N(R.sub.13).sub.2 ; PA1 R.sub.13 hydrogen, alkyl or aryl (the same or different); PA1 R hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 …