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Journal of Thermal Analysis and Calorimetry

, Volume 125, Issue 1, pp 397–405 | Cite as

A comparative study on thermal behavior of solid-state light trivalent lanthanide isonicotinates in dynamic dry air and nitrogen atmospheres

  • W. D. G. Nunes
  • J. A. Teixeira
  • A. L. C. S. do Nascimento
  • F. J. Caires
  • E. Y. Ionashiro
  • M. IonashiroEmail author
Article

Abstract

Characterization, thermal stability, and thermal decomposition of light trivalent lanthanide isonicotinates Ln(L)3·2H2O (Ln = La to Gd, except Pm; L = isonicotinate) were investigated employing simultaneous thermogravimetry and differential scanning calorimetry (TG–DSC), DSC, infrared spectroscopy (FTIR), evolved gas analysis by TG–DSC coupled to FTIR, elemental analysis, and complexometry. The dehydration of these compounds occurs in a single step, and the thermal decomposition of the anhydrous compounds occurs in one or two (air) and two or three steps (N2). The final residues of thermal decomposition were CeO2, Pr6O11, and Ln2O3 (Ln = La, Nd to Gd) in air atmosphere, while in N2 atmosphere the mass loss is still being observed up to 1000 °C. The results also provided information concerning the gaseous products evolved during the thermal decomposition in dynamic dry air and nitrogen atmospheres.

Keywords

Lanthanide isonicotinates Thermal behavior Evolved gas analysis 

Notes

Acknowledgements

The authors thank FAPESP (Proc. 2013/09022-7), CNPq, and CAPES foundations (Brazil) for financial support.

Supplementary material

Supplementary material 1 (AVI 42409 kb)

Supplementary material 2 (AVI 234896 kb)

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2016

Authors and Affiliations

  • W. D. G. Nunes
    • 1
  • J. A. Teixeira
    • 1
  • A. L. C. S. do Nascimento
    • 1
  • F. J. Caires
    • 2
  • E. Y. Ionashiro
    • 3
  • M. Ionashiro
    • 1
    Email author
  1. 1.Instituto de QuímicaUniversidade Estadual PaulistaAraraquaraBrazil
  2. 2.Faculdade de CiênciasUniversidade Estadual PaulistaBauruBrazil
  3. 3.Instituto de QuímicaUniversidade Federal de GoiásGoiâniaBrazil

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