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Thermal behaviour of I--hydroxyisobutyric acid, sodium I--hydroxyisobutyrate and its compounds with some bivalent transition metal ions

Gomes, DJC ; Caires, F J ; Lima, L S ; Gigante, A C ; Ionashiro, M

Thermochimica acta, 2013-07, Vol.564, p.7-12 [Periódico revisado por pares]

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  • Título:
    Thermal behaviour of I--hydroxyisobutyric acid, sodium I--hydroxyisobutyrate and its compounds with some bivalent transition metal ions
  • Autor: Gomes, DJC ; Caires, F J ; Lima, L S ; Gigante, A C ; Ionashiro, M
  • Assuntos: Copper ; COPPER OXIDE ; DECOMPOSITION ; Fourier transforms ; Infrared spectroscopy ; PROPERTIES ; Sodium ; Sodium salts ; Thermal decomposition ; Thermal properties ; Transition metals
  • É parte de: Thermochimica acta, 2013-07, Vol.564, p.7-12
  • Notas: ObjectType-Article-2
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  • Descrição: Synthesis, characterization and thermal decomposition of bivalent transition metal I--hydroxyisobutyrates, M(C4H7O3)2ADTnH2O (M = Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II)), as well as the thermal behaviour of I--hydroxyisobutyric acid and its sodium salt were investigated employing simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC), infrared spectroscopy (FTIR), TG-DSC coupled to FTIR, elemental analysis and complexometry. All the compounds were obtained as dihydrated, except the copper one which was obtained in the anhydrous state. The thermal decomposition of the anhydrous compounds occurs in a single or two steps and the final residue up to 235 degree C (Mn), 300 degree C (Fe), 305 degree C (Co), 490 degree C (Ni), 260 degree C (Cu) and 430 degree C (Zn) is Mn2O3, Fe2O3, Co3O4, NiO, CuO and ZnO, respectively. The results also provided information concerning the ligand's denticity and identification of the gaseous products evolved during the thermal decomposition of these compounds.
  • Idioma: Holandês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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