Multifunctional 3,4-alkylenedioxythiophene derivatives and electrically conductive polymers containing them

US7358326B2 · kind B2 · utility

Assignee

• H.C. STARCK INC. · US

Inventors

• Helmut-Werner Heuer · Krefeld, DE
• Rolf Wehrmann · Krefeld, DE

Key dates

• Filing date: Dec 6, 2004
• Grant date: Apr 15, 2008
• Expiry date: Mar 1, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G61/126
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Multifunctional 3,4-alkylenedioxythiophene derivatives represented by formula (I) are described,In formula (I), n and m each independently of each other, and independently for each o, are an integer from 1 to 5, and o is 3 or 4. The groups R1, R2, R3 and R4 are independently of each other and independently for each o, selected from, for example, hydrogen, halogen and optionally substituted linear or branched C1-C20-alkyl. The group R— of formula (I) may be, independently for each o, hydrogen or a thiophene represented by the following formula (II),in which m, n, R1, R2, R3 and R4 are as described in formula (I). The group X— of formula (I) is a polyvalent linking unit (e.g., a triphenylamine radical). Also described are electrically conductive oligomers and polymers comprising the multifunctional 3,4-alkylenedioxythiophene derivatives of the present invention as a repeating or crosslinking unit.