منابع مشابه
Photosystem II electron transfer: the manganese complex to P680.
bridges in transition metal clusters are unreactive as a class, they would require special activation if they were to be involved in oxidations or 0-0 bond formation. We propose that the unusual electronic configuration of the Mn, cluster of the WOC is an expression of this activation. Formation of the activated (dn)3(dx2-,2)' electron configuration may also be explained if the Mn"' ions have o...
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The synthesis and photophysical characterization of two different series of electron donor-acceptor dyads containing Ru(II) and Os(II) bis-terpyridines (M(tpy)(2)(2+)) were prepared and studied in order to compare the oft-studied Ru(tpy)(2)(2+) chromophore with the less studied Os(tpy)(2)(2+) chromophore. The first series of dyads incorporates a benzoquinone (BQ) group as the electron acceptor,...
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A ruthenium(II) complex with two 4,4'-bis(trifluoromethyl)-2,2'-bipyridine chelates and a 2-(2'-pyridyl)imidazole ligand was synthesized and characterized by electrochemical and optical spectroscopic means. The respective complex has the potential to act as a combined electron-proton donor when promoted to its long-lived (3)MLCT excited state with visible light. The possibility of proton-couple...
متن کاملSpectral analysis of electron transfer kinetics II
Electron transfer processes in Debye solvents are studied using a spectral analysis method recently proposed. Spectral structure of a nonadiabatic twostate diffusion equation is investigated to reveal various kinetic regimes characterized by a broad range of physical parameters; electronic coupling, energy bias, reorganization energy, and solvent relaxation rate. Within this unified framework, ...
متن کاملElectron-Transfer Pathways in the Heme and Quinone-Binding Domain of Complex II (Succinate Dehydrogenase)
Single electron transfers have been examined in complex II (succinate:ubiquinone oxidoreductase) by the method of pulse radiolysis. Electrons are introduced into the enzyme initially at the [3Fe-4S] and ubiquinone sites followed by intramolecular equilibration with the b heme of the enzyme. To define thermodynamic and other controlling parameters for the pathways of electron transfer in complex...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 2005
ISSN: 0021-9258
DOI: 10.1074/jbc.m506002200