PHOTOREDUCTION OF HYDROGENCARBONATE OR ETHYLENE CATALYZED BY TRISODIUM TRISULFONATOPHTHALOCYANINATOZINCATE(II)

In an aqueous dimethyl sulfoxide (DMSO) solution of triethanolamine (T EOA), the photosensitizer of the title complex (1), and 1,1'-dimethyl- 4,4'-bipyridinium dichloride (MVCl2), MV.+ radicals were formed upon i rradiation with visible light; the photoreduction proceeded with light from both the B-(340 nm) and Q-(674 nm) band wavelengths of 1. The ph otoreduction of hydrogencarbonate to methane was performed in an aqueo us DMSO solution of an electron donor, 1, MVCl2, and ruthenium colloid upon irradiation with visible light. Ethylene was also photoreduced t o ethane upon the irradiation of an aqueous solution of an electron do nor, 1, MVCl2, and palladium colloid.