Synthesis and chemical properties of conjugated polyacetylenes having pendant fullerene and/or porphyrin units

Conjugated polyacetylenes having pendant fullerene and/or porphyrin groups were prepared by copolymerization in the presence of [Rh(nbd)Cl]2−NEt3 in CHCl3. The photochemical and electrochemical properties of the polymers were studied by UV−vis spectroscopy and voltammetry. The photoinduced charge-transfer properties of the monolayer films were also measured by a three-electrode cell technique. More importantly, poly(1a0.2-co-50.8) shows a high capacity to form a photoinduced charge-separated state and to produce steady and prompt photocurrent at the irradiation of 21.2 mW cm-2 white light. We estimate an aerobic IPCE value of 0.15% for a true monolayer coverage of poly(1a0.2-co-50.8) at its peak absorption around 440 nm (the maximum of the Soret band).