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Evidence for Iodine Atoms as Intermediates in the Dye Sensitized Formation of I-ˆ’I Bonds
Johns Hopkins University.ORCID iD: 0000-0002-4782-4969
Johns Hopkins University.
Johns Hopkins University.
2008 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 130, no 51, 17252-17253 p.Article in journal (Refereed) Published
Abstract [en]

Visible light excitation of [Ru(bpz)2(deeb)](PF6)2, where bpz is 2,2?-bipyrazine and deeb is 4,4?-(CO2Et)2-2,2?-bipyridine, in acetonitrile solutions with iodide is shown to initiate excited-state electron transfer reactions that yield iodine atoms. The iodine atoms subsequently react with iodide to form the I?I bond in I2??. The resultant Ru(bpz?)(bpz)(deeb)+, I2?? stores ?1.64 eV of free energy and returns cleanly to ground-state products with kcr = (2.1 ± 0.3) ? 1010 M?1 s?1.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2008. Vol. 130, no 51, 17252-17253 p.
Keyword [en]
NANOCRYSTALLINE SOLAR-CELLS; EXCITED-STATES; TIO2; REGENERATION; OXIDATION; DYNAMICS
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-51578DOI: 10.1021/ja807703mISI: 000263320600024OAI: oai:DiVA.org:kth-51578DiVA: diva2:464754
Note
QC 20111220Available from: 2011-12-20 Created: 2011-12-13 Last updated: 2017-12-08Bibliographically approved

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Gardner, James M.

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