Effective photoreduction of CO2 catalyzed by oligo(p-phenylenes)

Shozo Yanagida; Shinjiro Matsuoka

doi:10.1117/12.130581

9 December 1992 Effective photoreduction of CO₂ catalyzed by oligo(p-phenylenes)

Shozo Yanagida, Shinjiro Matsuoka

Author Affiliations +

Proceedings Volume 1729, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Photovoltaics, Photochemistry, Photoelectrochemistry; (1992) https://doi.org/10.1117/12.130581
Event: Optical Materials Technology for Energy Efficiency and Solar Energy, 1992, Toulouse-Labege, France

Abstract

Photoreduction of CO₂ to formic acid (HCO₂^-) and a small quantity of carbon monoxide (CO) can be achieved in N,N-dimethylformamide by using oligo(p- phenylenes) (OPP-n) as a photocatalyst and triethylamine (TEA) as a sacrificial electron donor under > 290 nm irradiation. Among OPP-n, p-terphenyl (OPP-3) and p-quaterphenyl (OPP-4) show high photocatalytic activity for the formation of HCO₂^-, in which the apparent quantum yields of HCO₂^- formation for OPP-3 and OPP-4 are 0.072 and 0.084, respectively. The laser flash photolysis and pulse radiolysis studies reveal that the photocatalysis initially start from the reductive quenching of the singlet state of OPP-n by TEA followed by the formation of the radical anion of OPP-n, OPP-n^-, resulting in direct electron transfer from OPP-n^- to CO₂ molecules.

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Shozo Yanagida and Shinjiro Matsuoka "Effective photoreduction of CO₂ catalyzed by oligo(p-phenylenes)", Proc. SPIE 1729, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Photovoltaics, Photochemistry, Photoelectrochemistry, (9 December 1992); https://doi.org/10.1117/12.130581

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