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Bio-inspired, side-on attachment of a ruthenium photosensitizer to an iron hydrogenase active site model
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2006 (Engelska)Ingår i: Dalton Transactions, ISSN 1477-9226, E-ISSN 1477-9234, nr 38, s. 4599-4606Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
2006. nr 38, s. 4599-4606
Nyckelord [en]
mlct excited-states, photophysical properties, desulfovibrio-desulfuricans, complexes, coordination, ligand, delocalization, photochemistry, chemistry, evolution
Identifikatorer
URN: urn:nbn:se:kth:diva-16025DOI: 10.1039/b606659cISI: 000240935300009Scopus ID: 2-s2.0-33749335261OAI: oai:DiVA.org:kth-16025DiVA, id: diva2:334067
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QC 20100525Tillgänglig från: 2010-08-05 Skapad: 2010-08-05 Senast uppdaterad: 2017-12-12Bibliografiskt granskad

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