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A molecular ruthenium catalyst with water-oxidation activity comparable to that of photosystem II
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.ORCID iD: 0000-0003-1662-5817
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2012 (English)In: Nature Chemistry, ISSN 1755-4330, Vol. 4, no 5, 418-423 p.Article in journal (Refereed) Published
Abstract [en]

Across chemical disciplines, an interest in developing artificial water splitting to O-2 and H-2, driven by sunlight, has been motivated by the need for practical and environmentally friendly power generation without the consumption of fossil fuels. The central issue in light-driven water splitting is the efficiency of the water oxidation, which in the best-known catalysts falls short of the desired level by approximately two orders of magnitude. Here, we show that it is possible to close that 'two orders of magnitude' gap with a rationally designed molecular catalyst [Ru(bda)(isoq)(2)] (H(2)bda = 2,2'-bipyridine-6,6'-dicarboxylic acid; isoq = isoquinoline). This speeds up the water oxidation to an unprecedentedly high reaction rate with a turnover frequency of >300 s(-1). This value is, for the first time, moderately comparable with the reaction rate of 100-400 s(-1) of the oxygen-evolving complex of photosystem II in vivo.

Place, publisher, year, edition, pages
2012. Vol. 4, no 5, 418-423 p.
Keyword [en]
Artificial Photosynthesis, Crystal-Structure, Dimer Complex, Efficient, Resolution, Chemistry, Stacking, Iridium, Ligand, Iron
National Category
Chemical Sciences
URN: urn:nbn:se:kth:diva-95089DOI: 10.1038/NCHEM.1301ISI: 000303109700018PubMedID: 22522263ScopusID: 2-s2.0-84860251823OAI: diva2:527696
Swedish Research CouncilKnut and Alice Wallenberg Foundation
QC 20120522Available from: 2012-05-22 Created: 2012-05-14 Last updated: 2012-05-22Bibliographically approved

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