Chemicals and Chemistry
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Scientists at University of Geneva target inorganic chemistry
March 6th, 2009
"Four homologous dyads with a phenothiazine donor, rigid variable-length p-xylene bridges, and a ruthenium(II) tris(2,2'-bipyridine) acceptor were synthesized. Photoexcitation of these donor-bridge-acceptor molecules in the presence of excess methylviologen generates a highly oxidizing Ru(III) intermediate, which triggers an intramolecular phenothiazine-to-ruthenium(III) electron transfer that is mediated by the oligo-p-xylene spacers," scientists writing in the journal Inorganic Chemistry report.
"The rates for this process were determined using transient absorption spectroscopy, and they are found to decrease exponentially with increasing donor-acceptor distance....
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Source: Chemicals and Chemistry (2009-03-06)