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Bio-inspired, side-on attachment of a ruthenium photosensitizer to an iron hydrogenase active site model
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Photochemistry and Molecular Science.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry.
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2006 (English)In: Dalton Transactions, ISSN 1477-9226, E-ISSN 1477-9234, no 38, 4599-4606 p.Article in journal (Refereed) Published
Abstract [en]

The first ruthenium - diiron complex [(mu- pdt) Fe-2(CO)(5){PPh2(C(6)H(4)CCbpy)} 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.

Place, publisher, year, edition, pages
2006. no 38, 4599-4606 p.
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Chemical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-83239DOI: 10.1039/b606659cISI: 000240935300009PubMedID: 17016571OAI: oai:DiVA.org:uu-83239DiVA: diva2:111146
Available from: 2006-10-25 Created: 2006-10-25 Last updated: 2011-06-09Bibliographically approved

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Abrahamsson, MariaBergquist, JonasBecker, Hans-ChristianHammarström, LeifOtt, Sascha

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Department of Photochemistry and Molecular ScienceDepartment of Physical and Analytical Chemistry
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