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Synthesis and electron transfer studies of ruthenium-terpyridine-based dyads attached to nanostructured TiO2
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2007 (English)In: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 46, no 3, 638-651 p.Article in journal (Refereed) Published
Abstract [en]

A series of bis(terpyridine)Ru-II complexes have been prepared, where one of the terpyridines is functionalized in the 4'-position by a phosphonic or carboxylic acid group for attachment to TiO2. The other is functionalized, also in the 4'-position, by a potential electron donor. In complexes 1a, 3a, and 4a,b, this donor is tyrosine or hydrogen-bonded tyrosine, while in 2a it is carotenoic amide. The synthesis and photophysical properties of the complexes are discussed. On irradiation with visible light, the formation of a long-lived charge-separated state was anticipated, via primary electron ejection into the TiO2, followed by secondary electron transfer from the donor to the photogenerated Ru-III. However, such a charge-separated state could be observed with certainty only with complex 2a. To explain the result, quantum chemical calculations were performed on the different types of complexes.

Place, publisher, year, edition, pages
2007. Vol. 46, no 3, 638-651 p.
Keyword [en]
nanocrystalline titanium-dioxide, photoinduced charge separation, density-functional theory, photosystem-ii, electrochemical properties, metal-complexes, excited-states, solar-cells, light, ligands
Identifiers
URN: urn:nbn:se:kth:diva-16346DOI: 10.1021/ic060858aISI: 000243789400009Scopus ID: 2-s2.0-33847132729OAI: oai:DiVA.org:kth-16346DiVA: diva2:334388
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Sun, Licheng

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