Patent ID: 8754175

Claim:
A one-pot method of making a poly(3-substituted thiophene) which is at least 70% monocapped with alkenyl or alkynyl end group comprising (i) preparing a poly(3-substituted thiophene) precursor to form a polymer reaction mixture; and (ii) reacting the precursor in the polymer reaction mixture with an alkenyl or alkynyl Grignard reagent to form in one pot the poly(3-substituted thiophene which is at least 70% monocapped with alkenyl or alkynyl end group, wherein the alkenyl or alkynyl end group comprises from two to five carbon atoms, and wherein the poly(3-substituted thiophene) which is at least 70% monocapped with alkenyl or alkynyl end group is also 20 percent or less dicapped.