Basic polypyrrylenemethines and salts thereof, and a process for their preparation

US5004560A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Hermann Braunling · Munich, DE
• Richard Becker · Burghausen, DE

Key dates

• Filing date: Mar 17, 1988
• Grant date: Apr 2, 1991
• Expiry date: Mar 17, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G61/124
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

Basic polypyrrylenemethines, and salts thereof, having conjugated double bonds and constructed from optionally substituted five-membered heterocyclic rings containing nitrogen, as the only hetero atom in the ring are disclosed, with the five-membered rings, in each case, being bonded to one another in pairs via an optionally substituted carbon atom as a bridging member. The polymer compositions of the invention contain at least five of these five-membered rings and 0 to 50%, relative to the weight of these polymers, of dopants and/or being electrochemically doped. A process for the preparation of the claimed compositions is further disclosed. The polymer compositions of the invention have electroconducting and semi-conducting properties and are useful, for example, in batteries, circuits and switches, if appropriately used in conjunction with other polymers. In addition, the compounds of the invention can also be employed as absorbents for heavy metals and as catalysts.