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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 (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.
Keyword [en]
mlct excited-states, photophysical properties, desulfovibrio-desulfuricans, complexes, coordination, ligand, delocalization, photochemistry, chemistry, evolution
URN: urn:nbn:se:kth:diva-16025DOI: 10.1039/b606659cISI: 000240935300009ScopusID: 2-s2.0-33749335261OAI: diva2:334067
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Sun, Licheng
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Organic Chemistry
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