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In the present work we describe the synthesis and study of a Ru II -Fe II chromophore-catalyst assembly designed to perform the light-induced activation of an iron bound water molecule and subsequent photo-driven oxidation of a substrate. Using a series of spectroscopic techniques, we demonstrate that excitation of the chromophore unit with 450 nm light, in the presence of a sacrificial electron acceptor, triggers a cascade of electron transfers leading to the formation of a high valent iron(iv)-oxo center from an iron(ii)-bound water molecule. The activity of this catalytic center is illustrated by the oxidation of triphenyl phosphine.

chemical science

Successive light-induced two electron transfers in a Ru–Fe supramolecular assembly: from Ru–Fe(<scp>ii</scp>)–OH<sub>2</sub> to Ru–Fe(<scp>iv</scp>)–oxo

Successive light-induced two electron transfers in a Ru–Fe supramolecular assembly: from Ru–Fe(ii)–OH2 to Ru–Fe(iv)–oxo

Successive light-induced two electron transfers in a Ru–Fe supramolecular assembly: from Ru–Fe(ii)–OH₂ to Ru–Fe(iv)–oxo