Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 73: Issue 3
Rare earth complexes with 4-methylmorpholine-N-oxide
Authors:
A. Garrido Pedrosa Federal University of Rio Grande do Norte Department of Chemistry Department of Chemistry C.P. 1692 59078-970 Natal, RN Brazil C.P. 1692 59078-970 Natal, RN Brazil

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M. Câmara Federal University of Rio Grande do Norte Department of Chemistry C.P. 1692 59078-970 Natal, RN Brazil C.P. 1692 59078-970 Natal, RN Brazil

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F. Borges Federal University of Rio Grande do Norte Department of Chemistry C.P. 1692 59078-970 Natal, RN Brazil C.P. 1692 59078-970 Natal, RN Brazil

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H. de Souza Federal University of Rio Grande do Norte Department of Chemistry C.P. 1692 59078-970 Natal, RN Brazil C.P. 1692 59078-970 Natal, RN Brazil

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H. Scatena Jr Federal University of Rio Grande do Norte Department of Chemistry C.P. 1692 59078-970 Natal, RN Brazil C.P. 1692 59078-970 Natal, RN Brazil

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D. Melo Federal University of Rio Grande do Norte Department of Chemistry Departamento de Química CCET C.P. 1692 59078-970 Natal, RN Brazil CCET C.P. 1692 59078-970 Natal, RN Brazil

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L. Zinner Federal University of Rio Grande do Norte Department of Chemistry Departamento de Química CCET C.P. 1692 59078-970 Natal, RN Brazil CCET C.P. 1692 59078-970 Natal, RN Brazil

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Pages:
895–902
Online Publication Date:
31 Oct 2004
Publication Date:
01 Sep 2003
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1025855102951
Keywords:
4-methylmorpholine-N-oxide; thermal decomposition; kinetics; rare earth complexes; trifluoroacetates
Restricted access

Abstract  

Complexes of rare earth trifluoroacetates (TFA) with 4-methylmorpholine-N-oxide (MMNO) of composition Ln(TFA)33MMNO (Ln=Eu, Dy, Ho, Er, Yb and Y) were synthesized and characterized by elemental analysis data, complexometric titration with EDTA, IR absorption spectra, thermogravimetric analyses and differential scanning calorimetry (DSC) in N2 atmosphere. Infrared spectroscopy data revealed that the MMNO molecules are bound to the central ion through the oxygen of NO groups. These data suggest that the trifluoracetate groups are also coordinated. Thermogravimetric curves indicate that the decomposition of MMNO begins at approximately 350 K and results in Ln2O3 residue at around 1170 K. A theoretical kinetic study was carried out using a QBASIC program with the TG input data for the Dy complex.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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