A Ruthenium(II)-Copper(II) Dyad for the Photocatalytic Oxygenation of Organic Substrates Mediated by Dioxygen Activation - Archive ouverte HAL Access content directly
Journal Articles Angewandte Chemie International Edition Year : 2015

A Ruthenium(II)-Copper(II) Dyad for the Photocatalytic Oxygenation of Organic Substrates Mediated by Dioxygen Activation

Abstract

Dioxygen activation by copper complexes is a valuable method to achieve oxidation reactions for sustainable chemistry. The development of a catalytic system requires regeneration of the Cu(I) active redox state from Cu(II) . This is usually achieved using extra reducers that can compete with the Cu(II) (O2 ) oxidizing species, causing a loss of efficiency. An alternative would consist of using a photosensitizer to control the reduction process. Association of a Ru(II) photosensitizing subunit with a Cu(II) pre-catalytic moiety assembled within a unique entity is shown to fulfill these requirements. In presence of a sacrificial electron donor and light, electron transfer occurs from the Ru(II) center to Cu(II) . In presence of dioxygen, this dyad proved to be efficient for sulfide, phosphine, and alkene catalytic oxygenation. Mechanistic investigations gave evidence about a predominant (3) O2 activation pathway by the Cu(I) moiety.

Domains

Catalysis
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Dates and versions

hal-01179368 , version 1 (20-11-2022)

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Attribution - NonCommercial

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Wissam Iali, Pierre-Henri Lanoe, Stéphane Torelli, Damien Jouvenot, Frédérique Loiseau, et al.. A Ruthenium(II)-Copper(II) Dyad for the Photocatalytic Oxygenation of Organic Substrates Mediated by Dioxygen Activation. Angewandte Chemie International Edition, 2015, 54 (29), pp.8415-8419. ⟨10.1002/anie.201501180⟩. ⟨hal-01179368⟩
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