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Flash-Quench Technique Employed To Study the One-Electron Reduction of Triiodide in Acetonitrile: Evidence for a Diiodide Reaction Product
Johns Hopkins University.
Johns Hopkins University.ORCID-id: 0000-0002-4782-4969
Johns Hopkins University.
2010 (engelsk)Inngår i: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 49, nr 22, s. 10223-10225Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The one-electron reduction of triiodide (I3?) by a reduced ruthenium polypyridyl compound was studied in an acetonitrile solution with the flash-quench technique. Reductive quenching of the metal-to-ligand charge-transfer excited state of [RuII(deeb)3]2+ by iodide generated the reduced ruthenium compound [RuII(deeb?)(deeb)2]+ and diiodide (I2??). The subsequent reaction of [RuII(deeb?)(deeb)2]+ with I3? indicated that I2?? was a product that appeared with a second-order rate constant of (5.1 ± 0.2) ? 109 M?1 s?1. After correction for diffusion and some assumptions, Marcus theory predicted a formal potential of ?0.58 V (vs SCE) for the one-electron reduction of I3?. The relevance of this reaction to solar energy conversion is discussed.

sted, utgiver, år, opplag, sider
American Chemical Society (ACS), 2010. Vol. 49, nr 22, s. 10223-10225
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URN: urn:nbn:se:kth:diva-51577DOI: 10.1021/ic1015466ISI: 000283810800005OAI: oai:DiVA.org:kth-51577DiVA, id: diva2:464762
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QC 20111221Tilgjengelig fra: 2011-12-21 Laget: 2011-12-13 Sist oppdatert: 2017-12-08bibliografisk kontrollert

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Farnum 2010 InorgChem v49 p10223(1467 kB)345 nedlastinger
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