Patent ID: 7262264
Filing Date: 2007-08-28
Classification: C08G

Abstract:
1. A method of forming a substituted polythiophene, comprising: a) providing a solvent soluble, substituted thiophene monomer, wherein said monomer has the structure: wherein X 1 and X 2 are different and each comprises a halogen atom, with at least one of the halogen atoms being capable of bonding with magnesium; R 1 comprises a C 1 to C 20 alkyl group, a C 1 to C 20 F-alkyl group, a C 1 to C 20 O-alkyl group, a C 1 to C 20 S-alkyl group, a C 6 to C 20 aryl group, fluorine or NO 2 ; and R 2 comprises hydrogen; b) combining the substituted thiophene monomer with magnesium metal and a methyl-tetrahydrofuran solvent to form a regiochemical intermediate; and c) reacting the regiochemical intermediate with a polymerization catalyst under conditions sufficient to polymerize the intermediate producing a regioregular, substituted polythiophene reaction product having repeating units of the structure: the polymer having a charge carrier mobility (μ) of at least about 1×10 −2 cm 2 /Vs and an on/off ratio of at least about 1×10 3 , and wherein n comprises from about 2 to about 10,000.