Artículos de revistas
Solid-state 2-methoxybenzoates of light trivalent lanthanides : SSSynthesis, characterization and thermal behaviour
Fecha
2008-03-01Registro en:
Journal of Thermal Analysis and Calorimetry, v. 91, n. 3, p. 897-902, 2008.
1388-6150
10.1007/s10973-007-8506-9
WOS:000254522500034
2-s2.0-45449096864
8460531302083773
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
Solid-state LnL(3) compounds, where L is 2-metboxybenzoate and Ln is light trivalent lanthanides, have been synthesized. Thermogravimetry (TG), differential scanning calorimetty (DSC), X-ray powder diffractometry, infrared spectroscopy and elementary analysis were used to characterize and to study the thermal behaviour of these compounds. The results led to information on the composition, dehydration, thermal stability and thermal decomposition of the isolated compounds. on heating these complexes decompose in three (Ce, Pr) or five (La, Nd, Sm) steps with the formation of the respective oxide: CeO2, Pr6O11 and Ln(2)O(3) (Ln=La, Nd, Sm) as final residues. The theoretical and experimental spectroscopic study suggests predominantly the ionic bond between the ligand and metallic center.