Mononuclear Iron Complexes with Tetraazadentate Ligands as Water Oxidation Catalysts
2016 (English)In: European Journal of Inorganic Chemistry, ISSN 1434-1948, E-ISSN 1099-1948, Vol. 20, 3262-3268 p.Article in journal (Refereed) Published
Two iron(II) complexes with tetraazadentate ligands have been synthesised, characterised and evaluated as water oxidation catalysts. The two ligands, N,N′-diisopropyl-N,N′-bis(2-pyridylmethyl)-1,2-diaminoethane (1), and N-methyl-N-(2-pyridinylmethyl)-2,2′-bipyridine-6-methanamine (2), both give iron(II)complexes (1Fe and 2Fe, respectively) with an octahedral coordination geometry with two labile triflate ligands in a cis configuration in the crystal structures. When treated with cerium(IV) as a chemical oxidant in aqueous solution at room temperature the complexes form semi-stable FeIV(O) species that can be detected in the UV/Visible region. Both 1Fe and 2Fe can act as catalysts for water oxidation when treated with a large excess of oxidant, but 1Fe is a better catalyst than 2Fe. Possible geometrical factors behind this difference in reactivity are discussed and compared with literature data.
Place, publisher, year, edition, pages
2016. Vol. 20, 3262-3268 p.
Homogeneous catalysis, Water chemistry, Water oxidation, Iron
Research subject Chemistry with specialization in Molecular Biomimetics
IdentifiersURN: urn:nbn:se:uu:diva-299885DOI: 10.1002/ejic.201600165OAI: oai:DiVA.org:uu-299885DiVA: diva2:950309
FunderSwedish Energy Agency, 11674-5Knut and Alice Wallenberg Foundation, 2011.0067