US 2004/0171790 A1 · Processes for preparing conductive macromolecular polythiophenes

Abstract

The present invention relates to a process for preparing polythiophenes comprised of unit structures of the general formula 1: 1 where R1 and R2 independently represent hydrogen or a C1˜C4 alkyl group, or together represent an optionally substituted C1˜C4 alkylene group, preferably an optionally alkyl-substituted methylene group, an optionally C1˜C4 alkyl- or phenyl-substituted 1,2-ethylene group, a 1,3-propylene group or a 1,2-cyclohexylene group. More specifically, the process according to the present invention is characterized by the fact that it is performed by cationic polymerization from 2,5-dihalothiophene in the presence of an acid catalyst, such as Lewis acid, protic acid, oxygen acid, or polymeric acid. The conductivity of the resulting polythiophene is 255 S/cm under optimal conditions.

Claims7

Dependent claims

A process for preparing conductive polythiophenes comprised of structural units of the general formula (1):

4
where R1 and R2 independently represent hydrogen or a C1˜C4 alkyl group, or together represent an optionally substituted C1˜C4 alkylene group, preferably an optionally alkyl-substituted methylene group, an optionally C1˜C4 alky- or phenyl-substituted 1,2-ethylene group, a 1,3-propylene group or a 1,2-cyclohexylene group;
which are prepared from 2,5-dihalothiophene of the general formula (2):
5
where R1 and R2 are described as above in the general formula (1), and X is a halogen atom selected from Cl, Br and I;
in the presence of an acid catalyst.

3 more elements

Dependencies are inferred from the claim text.

Processes for preparing conductive macromolecular polythiophenes

Life of this patent

Processes for preparing conductive macromolecular polythiophenes

Life of this patent

Abstract

Claims7