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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 (English)In: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 49, no 22, 10223-10225 p.Article in journal (Refereed) 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.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2010. Vol. 49, no 22, 10223-10225 p.
National Category
Inorganic Chemistry
URN: urn:nbn:se:kth:diva-51577DOI: 10.1021/ic1015466ISI: 000283810800005OAI: diva2:464762
QC 20111221Available from: 2011-12-21 Created: 2011-12-13 Last updated: 2011-12-21Bibliographically approved

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Gardner, James M.
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