Thermal decomposition of metal N,N-dialkylcarbamates: A TG-FTIR study

Thermogravimetric analysis coupled with IR spectroscopy was used to investigate the thermal stability and decomposition products of N,N -dialkylcarbamates of zirconium(IV), hafnium(IV), and niobium(IV), M(O 2 CNR 2 ) 4 . The niobium derivatives were less stable than the corresponding Zr(IV) and Hf(I...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2016-02, Vol.123 (2), p.1563-1569
Main Authors: Duce, Celia, Spepi, Alessio, Pampaloni, Guido, Piccinelli, Fabio, Tiné, Maria Rosaria
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Measurement Science and Instrumentation
Physical Chemistry
Polymer Sciences
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Summary:Thermogravimetric analysis coupled with IR spectroscopy was used to investigate the thermal stability and decomposition products of N,N -dialkylcarbamates of zirconium(IV), hafnium(IV), and niobium(IV), M(O 2 CNR 2 ) 4 . The niobium derivatives were less stable than the corresponding Zr(IV) and Hf(IV) derivatives, and the thermal stability was in the order of R = Et >  i Pr > Me. XRD analysis of the residue showed the formation of the oxides ZrO 2 (tetragonal, P4 2 /nmc ), HfO 2 , (monoclinic, P2 1 / c ), and Nb 2 O 5 (orthorhombic, Pbam ). TEM analysis showed that all the oxides were obtained as nanopowders with a crystal size below 30 nm.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-015-5053-7