Light-collecting systems and the use of coumarin derivatives as energy converters in them

US4526705A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Frank Arndt · Krefeld, DE
• Uwe Claussen · Leverkusen, DE
• Horst Harnisch
• Carl-Wolfgang Schellhammer · Bensberg, DE

Key dates

• Filing date: Dec 20, 1982
• Grant date: Jul 2, 1985
• Expiry date: Dec 20, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/52
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Light-collecting system, characterized in that it contains a coumarin derivative of the formula ##STR1## in which T designates O or NR.sub.4, wherein R.sub.4 represents hydrogen, optionally substituted alkyl or optionally substituted aryl; PA1 R.sub.1 designates a carbocyclic or heterocyclic, oxygen-free 5-membered or 6-membered ring which is linked via a C atom or a 5-membered or 6-membered heterocyclic ring which is linked via an N atom and which rotates unsymmetrically about an axis passing through the coumarin-N-heterocyclic ring linkage, it being possible for the 5-membered or 6-membered rings mentioned to carry non-ionic substituents and for an optionally substituted benzene ring or an optionally substituted naphthalene ring to be fused onto them; PA1 R.sub.2 designates hydrogen, alkyl, cycloalkyl, aralkyl or aryl, it being possible for the hydrocarbon radicals mentioned to be substituted, and R.sub.3 designates hydrogen, alkyl, cycloalkyl, aralkyl, aryl or a --OR.sub.5, --SO.sub.2 R.sub.5, --SO.sub.2 NHR.sub.5, --NHCOR.sub.5, halogen or COOR.sub.5 radical, wherein R.sub.5 represents alkyl, cycloalkyl, aralkyl or aryl, and the use of coumarin derivatives as energy converters …