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Visible Light-Driven Water Oxidation Promoted by Host-Guest Interaction between Photosensitizer and Catalyst with A High Quantum Efficiency
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2015 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 137, no 13, 4332-4335 p.Article in journal (Refereed) Published
Abstract [en]

A highly active supramolecular system for visible light-driven water oxidation was developed with cyclodextrin-modified ruthenium complex as the photosensitizer, phenyl-modified ruthenium complexes as the catalysts, and sodium persulfate as the sacrificial electron acceptor. The catalysts were found to form 1:1 host-guest adducts with the photosensitizer. Stopped-flow measurement revealed the host-guest interaction is essential to facilitate the electron transfer from catalyst to sensitizer. As a result, a remarkable quantum efficiency of 84% was determined under visible light irradiation in neutral aqueous phosphate buffer. This value is nearly 1 order of magnitude higher than that of noninteraction system, indicating that the noncovalent incorporation of sensitizer and catalyst is an appealing approach for efficient conversion of solar energy into fuels.

Place, publisher, year, edition, pages
2015. Vol. 137, no 13, 4332-4335 p.
Keyword [en]
Mononuclear Ruthenium Complexes, Splitting Recent Progress, Photoelectrochemical Cells, Future Challenges, Molecular-Systems, Electron-Transfer, Ligands, Photosynthesis, Reduction, Devices
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Identifiers
URN: urn:nbn:se:kth:diva-166324DOI: 10.1021/jacs.5b01924ISI: 000352752000015PubMedID: 25799114Scopus ID: 2-s2.0-84926685158OAI: oai:DiVA.org:kth-166324DiVA: diva2:810852
Funder
Swedish Energy AgencyKnut and Alice Wallenberg Foundation
Note

QC 20150508

Available from: 2015-05-08 Created: 2015-05-07 Last updated: 2017-12-04Bibliographically approved

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Sun, Licheng

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