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


ABSTRACT: In the present work we describe the synthesis and study of a RuII-FeII 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.

SUBMITTER: Herrero C 

PROVIDER: S-EPMC5488195 | biostudies-literature | 2015 Apr

REPOSITORIES: biostudies-literature

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

Herrero Christian C   Quaranta Annamaria A   Sircoglou Marie M   Sénéchal-David Katell K   Baron Aurélie A   Marín Irene Mustieles IM   Buron Charlotte C   Baltaze Jean-Pierre JP   Leibl Winfried W   Aukauloo Ally A   Banse Frédéric F  

Chemical science 20150126 4


In the present work we describe the synthesis and study of a Ru<sup>II</sup>-Fe<sup>II</sup> 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 h  ...[more]

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