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Application of coupled TG-FTIR system in studies of thermal stability of manganese(II) complexes with amino acids.

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Abstract

Detailed thermal analysis of manganese(II) complexes with a-amino acids were carried out. The thermal degradation is multi-stage. Dehydration of complexes is the first mass loss step. Anhydrous compounds are unstable and decompose to Mn3O4 in air or to MnO in inert atmosphere. The intermediate solid products were identified by TG method and TG/FTIR combined technique. Among others solid residues, the presence of MnSO4, MnBr2 and Mn(CH3COO)Cl was found. In the gaseous products of decomposition of organic ligand H2O, NH3, CO2, CO, aromatic and non-aromatic hydrocarbons and very probably cyanoacetic acid and dimethyl sulfide occurred. Inorganic ions, i.e. Cl-, Br-or So4 2-remain in the solid products of decomposition or are lost as HCl, HBr or SO2.

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Authors and Affiliations

  1. Faculty of Chemistry, University of Maria Curie-Skłodowska, Maria Curie-Skłodowska Sq. 2, 20-031, Lublin, Poland

    M. Sikorska-Iwan & R. Mrozek- Łyszczek

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  1. M. Sikorska-Iwan
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  2. R. Mrozek- Łyszczek
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Sikorska-Iwan, M., Mrozek- Łyszczek, R. Application of coupled TG-FTIR system in studies of thermal stability of manganese(II) complexes with amino acids.. Journal of Thermal Analysis and Calorimetry 78, 487–500 (2004). https://doi.org/10.1023/B:JTAN.0000046113.50448.63

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  • DOI: https://doi.org/10.1023/B:JTAN.0000046113.50448.63

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