SYNTHESIS OF CONJUGATED POLYMER BY THE STILLE COUPLING REACTION

Reported on is the feasibility of a coupling reaction between dihalide and ditin compounds, catalyzed by a palladium compound, to synthesize conjugated polymers. As 2,5-dialkoxy-1,4-diiodobenzene was coupled with 2,5-bis(tri-n-butyltin)thiophene, a soluble and fusible polymer, poly(2,5-alkoxy-p-phenylene-co-2,5-thiophene), was obtained. The rich access to monomers, the mild reaction conditions. and the tolerance to different substituents make this reaction versatile in synthesizing new conjugated polymers.