Synthesis and properties of poly(aryleneethynylenes) with hexyl-substituted oligothiophene groups

A series of new poly(phenyleneethynylenes) with a regular structure were prepared by the Pd-catalyzed condensation of dibromides and diethynyl compounds, such as the derivatives of hexyl-substituted oligo(thiophenes), anthracene, and benzene. The structure of the synthesized polymers was determined by NMR spectroscopy. The optical properties of monomers, model compounds, and polymers were studied. The polymers of interest, in particular, those containing anthracene units, show appreciable luminescence quantum yields. The luminescence quantum yields of the corresponding polymers are lower than those of the monomers containing anthracene and benzene.