New Photoreduction Catalysis by + (N-N = 2,9-Dimethyl-1,10-phenanthroline or 4,4',6,6'-Tetramethyl-2,2'-bipyridine) and Its Application to Cobalt(III) Complexes

DOI: 10.1039/DT9850001959

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1959 - 1962 (1985)

Update date:2022-08-16

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Authors:

Sakaki, Shigeyoshi

Koga, Genji

Sato, Fumio

Ohkubo, Katsutoshi

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Article abstract of DOI:10.1039/DT9850001959

The copper(I) complexes + photocatalytically reduce cobalt(III) complexes such as ²⁺, ^- (edta = ethylenediaminetetra-acetate), and (acac = acetylacetonate), upon irradiation with near-u.v. light corresponding to the metal-to-ligand charge-transfer absorption band (about 360 nm) of the copper(I) copmlex.This is a new type of photocatalytic reduction by copper(I) complexes.The photosensitising mechanism is discussed on the basis of the Stern-Volmer relationship.The dmphen complex has a higher activity than that of the tmbipy analogue, and the reactivity of the cobalt(III) complexes decreases ine the order ²⁺ > ^- > .The results are discussed in terms of the lifetime of the exciter copper(I) complex and the irradiation potentials of the cobalt(III) complexes.

Full text of DOI:10.1039/DT9850001959

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