Photo-Induced Water Oxidation Based on a Mononuclear Cobalt(II) Complex
2014 (English)In: Chinese journal of chemistry, ISSN 1001-604X, E-ISSN 1614-7065, Vol. 32, no 6, 467-473 p.Article in journal (Refereed) Published
Photo-induced water oxidation based on first row transition metal complexes has drawn much attention recently as a part of the efforts to design systems for solar fuel production. Here, the classic tetradentate ligand TPA (tris(2-pyridylmethyl)amine) is used together with cobalt(II) in CH3CN to form a mononuclear cobalt complex [Co(TPA)Cl]Cl. Single crystal X-ray diffraction shows that [Co(TPA) Cl] Cl is composed of discrete cationic units with a penta-coordinate cobalt center, along with chloride counter ions. In borate buffer, the Co complex acts as a water oxidation catalyst, as shown by the presence of a catalytic wave in electrochemistry. Under visible light irradiation, in the presence of photosensitizer and electron acceptor, the Co complex catalyzes O-2 evolution with a turnover frequency (TOF) of 1.0 mol(O-2)center dot mol(Co)(-1)center dot s(-1) and a turnover number (TON) of 55 mol(O-2)center dot mol(Co)(-1) in pH 8 borate buffer.
Place, publisher, year, edition, pages
2014. Vol. 32, no 6, 467-473 p.
water splitting, photosynthesis, cobalt, ligand design, electron transfer
IdentifiersURN: urn:nbn:se:uu:diva-229304DOI: 10.1002/cjoc.201300856ISI: 000338041200002OAI: oai:DiVA.org:uu-229304DiVA: diva2:736371