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2012 | 10 | 4 | 1079-1086

Article title

New iron-cobalt clusters with silicon-containing dicarboxylic acids


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For the first time, silicon-containing dicarboxylic acids were used to prepare two new heterotrinuclear carboxylates of the composition [Fe2IIICoIIO(Bcpdps)3(H2O)3], I, where H2Bcpdps ≡ HOOC-C6H4-Si(C6H5)2-C6H4COOH, and [Fe2IIICoIIO(Ipds)3(H2O)3], II, where H2Ipds ≡ [HOOC-C6H3(CO)2N-(CH2)3-(CH3)2Si]2O. The precursor for these two complexes was trinuclear µ3-oxo-hexaacetate triaqua diiron(III)cobalt(II) cluster, {Fe 2 CoO}, in which the acetate anions were subsequently substituted by silicon-containing dianions. The resulting products were characterized by elemental analysis, thermogravimetry, Fourier Transform Infrared (FTIR), Energy-Dispersive X-ray Fluorescence (EDXRF), and Mossbauer spectroscopies (MS). The investigation by MS revealed the presence of the iron(3+) ions in high spin state and having the close environment. Thermogravimetric analysis results indicated an improving in the thermal stability by replacing acetate anions with silicon-containing carboxyl ligands. This widens the temperature range in which such compounds can be used in practical applications. [...]










Physical description


1 - 8 - 2012
29 - 5 - 2012


  • “Petru Poni” Institute of Macromolecular Chemistry, Iasi, 700487, Romania
  • “Petru Poni” Institute of Macromolecular Chemistry, Iasi, 700487, Romania
  • Department of Chemical Engineering, “Gh. Asachi” Technical University Iasi, Iasi, 700050, Romania


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