New iridium(III) organometallic complexes bearing strong electron donating bidentate ligands as catalysts for water oxidation

Savini, Arianna, Bucci, Alberto, Bellachioma, Gianfranco, Giancola, Stefano, Palomba, Francesco, Rocchigiani, Luca, Rossi, Andrea, Suriani, Marta, Zuccaccia, Cristiano and Macchioni, Alceo (2014) New iridium(III) organometallic complexes bearing strong electron donating bidentate ligands as catalysts for water oxidation. Journal of Organometallic Chemistry, 771. pp. 24-32. ISSN 0022-328X

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Abstract

Complexes [Cp*Ir(ppy)NO3] (ppy = 2-phenylpyridine, 1), [Cp*Ir(2′,4′-F2-ppy)NO3] (2b), [Cp*Ir(κ2-C2,C2′-NHC)Cl], (κ2-C2,C2′-NHC = κ2-C2,C2′-1,3-bis(4-(N,N-dimethylamino)phenyl)-imidazol-2-ylidene, 3), [Cp*Ir(bpyr)(SOMe2)] (bpyr = bis-diethyl-pyrrole, 4), [Cp*Ir(bimH2)Cl]Cl (bimH2 = 2,2′-bisimidazole, 5) and [Cp*IrCl(μ2-κ2-κ1-bimH)IrCl2Cp*] (6) have been synthesized and characterized in solution by multinuclear and multidimensional NMR spectroscopy. The structures in the solid state of 3 and 6 have been determined by means of single-crystal diffraction X-Ray studies. Complexes 1–6 were found to be effective catalysts for water oxidation to molecular oxygen driven by cerium ammonium nitrate. The highest activity was observed for 4 (TOFmax = 12 min−1, TON > 500), 5 (TOFmax = 23 min−1, TON > 500) and 6 (TOFmax = 51 min−1, TON > 500) bearing more electron-donating ligands.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
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Depositing User: LivePure Connector
Date Deposited: 19 Jun 2019 08:30
Last Modified: 22 Apr 2020 07:57
URI: https://ueaeprints.uea.ac.uk/id/eprint/71479
DOI: 10.1016/j.jorganchem.2014.05.029

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