Photo‐Induced Water Oxidation Based on a Mononuclear Cobalt(II) Complex. Issue 6 (17th February 2014)

• Record Type: Journal Article
• Authors: Wang, Hongyan; Lu, Yongbin; Mijangos, Edgar; Thapper, Anders
• Is Part Of: Chinese journal of chemistry. Volume 32:Issue 6(2014:Jun.)
• Page Start: 467
• Page End: 473
• Publication Date: 2014-02-17
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cjoc.201300856
• Languages: English
• ISSNs: 1001-604X

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 O₂ evolution with a turnover frequency (TOF) of 1.0 mol(O₂)·mol(Co)⁻¹·s⁻¹ and a turnover number (TON) of 55 mol(O₂)·mol(Co)⁻¹ in pH 8 borate buffer.</p> </abstract>