Počet záznamů: 1

Use of emanation thermal analysis and evolved gas analysis in thermal study of zinc(II) benzoate complex compounds

  1. 1.
    0357514 - UACH-T 2011 RIV HU eng J - Článek v odborném periodiku
    Findoráková, L. - Györyová, K. - Večerníková, Eva - Balek, V.
    Use of emanation thermal analysis and evolved gas analysis in thermal study of zinc(II) benzoate complex compounds.
    Journal of Thermal Analysis and Calorimetry. Roč. 98, č. 3 (2009), s. 765-769 ISSN 1388-6150
    Výzkumný záměr: CEZ:AV0Z40320502
    Klíčová slova: zinc(II) benzoate * caffeine * urea * thermogravimetry
    Kód oboru RIV: CA - Anorganická chemie
    Impakt faktor: 1.587, rok: 2009

    Thermal behaviours of three zinc(II) benzoate complex compounds (two new with caffeine and urea), namely Zn(C6H5COO)(2), Zn(C6H5COO)(2)center dot caf(2), Zn(C6H5COO)(2)center dot u(2), were characterized by using thermogravimetry (TG/DTG), differential thermal analysis (DTA), evolved gas analysis (EGA) with mass spectrometry (MS) detection and emanation thermal analysis (ETA). Temperature intervals of the stability of the compounds as well as the mechanisms of their thermal degradation were determined. From TG and DTA results it followed that the oxidative degradation of urea with CO2 or caffeine with CO2 from the investigated Zn(II) benzoate complex compounds takes place as the first step of their thermal degradation. In the second step of thermal degradation diphenylketone was release. The evolved gas analysis has been used to determine intermediate products of thermal degradation and temperature ranges of their evolution from the samples.
    Trvalý link: http://hdl.handle.net/11104/0195775