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New iron-cobalt clusters with silicon-containing dicarboxylic acids

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Central European Journal of Chemistry

Abstract

For the first time, silicon-containing dicarboxylic acids were used to prepare two new heterotrinuclear carboxylates of the composition [Fe2 IIICoIIO(Bcpdps)3(H2O)3], I, where H2Bcpdps ≡ HOOC-C6H4-Si(C6H5)2-C6H4COOH, and [Fe2 IIICoIIO(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.

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Authors and Affiliations

  1. “Petru Poni” Institute of Macromolecular Chemistry, Iasi, 700487, Romania

    Maria Cazacu, Angelica Vlad & Constantin Turta

  2. Institute of Chemistry of ASM, Chisinau, 2028, Republic of Moldova

    Constantin Turta

  3. Department of Chemical Engineering, “Gh. Asachi” Technical University Iasi, Iasi, 700050, Romania

    Gabriela Lisa

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  1. Maria Cazacu
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  2. Angelica Vlad
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  3. Constantin Turta
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  4. Gabriela Lisa
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Correspondence to Maria Cazacu.

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Cazacu, M., Vlad, A., Turta, C. et al. New iron-cobalt clusters with silicon-containing dicarboxylic acids. cent.eur.j.chem. 10, 1079–1086 (2012). https://doi.org/10.2478/s11532-012-0022-5

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  • DOI: https://doi.org/10.2478/s11532-012-0022-5

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