Hetero‐ and homo‐leptic Ru(II) catalyzed synthesis of cyclic carbonates from CO2; Synthesis,spectroscopic characterization and electrochemical properties |
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| Authors: | Ahmet Kilic Mahmut Ulusoy Mustafa Durgun Zeynep Tasci Ismail Yilmaz Bekir Cetinkaya |
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| Institution: | 1. Department of Chemistry, University of Harran, 63190, Sanliurfa, Turkey;2. Department of Chemistry, Ege University, 35100‐Bornova, Izmir, Turkey;3. Department of Chemistry, Technical University of Istanbul, 34469, Istanbul, Turkey |
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| Abstract: | Based on the a ligand BDPPZ (9a,13a‐dihydro‐4,5,9,14‐tetraaza‐benzob]triphenylene‐11‐yl)‐phenyl‐methanone] (1) and its polypyridyl hetero‐ and homoleptic Ru(II) metal complexes, Ru(bpy)2L](PF6)2 (2), Ru(phen)2L](PF6)2 (3), Ru(dafo)2L](PF6)2 (4), Ru(dcbpy)2L](PF6)2 (5) and RuL3](PF6)2 (6) (where, L = ligand, bpy = 2,2′‐bipyridine, phen = 1,10‐phenantroline, dafo = 4,5‐diazafluoren‐9‐one and dcbpy = 3,3′‐dicarboxy‐2,2′‐bipyridine), have been synthesized and characterized by elemental analysis, UV–vis, FT‐IR, 1H and 13C‐NMR spectra (for ligand), molar conductivity measurements and X‐ray powder techniques. The electrochemical parameters of the substituted ligand and its polypyridyl hetero‐ and homoleptic Ru(II) metal complexes are reported by cyclic voltammetry. UV–vis spectroscopy is used to compare the differences between the conjugated π systems in this ligand and its Ru(II) metal complexes. The polypyridyl hetero‐ and homoleptic Ru(II) metal complexes also tested as catalysts for the formation of cyclic organic carbonates from carbon dioxide and liquid epoxides which served as both reactant and solvent. The results showed that the Ru(L)3](PF6)2 (6) complex is more efficient than the other Ru(II) complexes for the formation of cyclic organic carbonates from carbon dioxide. Copyright © 2010 John Wiley & Sons, Ltd. |
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| Keywords: | Ru(II) complexes catalysts carbon dioxide cyclic carbonate |
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