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Issue 38, 2006
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Bio-inspired, side-on attachment of a ruthenium photosensitizer to an iron hydrogenase active site model

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Abstract

The first ruthenium–diiron complex [(µ-pdt)Fe2(CO)5{PPh2(C6H4CCbpy)}Ru(bpy)2]2+1 (pdt = propyldithiolate, bpy = 2,2′-bipyridine) is described in which the photoactive ruthenium trisbipyridyl unit is linked to a model of the iron hydrogenase active site by a ligand directly attached to one of the iron centers. Electrochemical and photophysical studies show that the light-induced MLCT excited state of the title complex is localized towards the potential diiron acceptor unit. However, the relatively mild potential required for the reduction of the acetylenic bipyridine together with the easily oxidized diiron portion leads to a reductive quenching of the excited state, instead. This process results in a transiently oxidized diiron unit which may explain the surprisingly high light sensitivity of complex 1.

Graphical abstract: Bio-inspired, side-on attachment of a ruthenium photosensitizer to an iron hydrogenase active site model

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Publication details

The article was received on 11 May 2006, accepted on 18 Jul 2006 and first published on 08 Aug 2006


Article type: Paper
DOI: 10.1039/B606659C
Dalton Trans., 2006, 4599-4606

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    Bio-inspired, side-on attachment of a ruthenium photosensitizer to an iron hydrogenase active site model

    J. Ekström, M. Abrahamsson, C. Olson, J. Bergquist, F. B. Kaynak, L. Eriksson, L. Sun, H. Becker, B. Åkermark, L. Hammarström and S. Ott, Dalton Trans., 2006, 4599
    DOI: 10.1039/B606659C

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