Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2015-04-08

Journal: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

Included Journals: Scopus、PubMed、EI、SCIE

Volume: 137

Issue: 13

Page Number: 4332-4335

ISSN: 0002-7863

Abstract: 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.