Otro
Synthesis, characterization and thermal behaviour of solid-state compounds of light trivalent lanthanide succinates
Registro en:
Thermochimica Acta. Amsterdam: Elsevier B.V., v. 501, n. 1-2, p. 50-54, 2010.
0040-6031
10.1016/j.tca.2010.01.001
WOS:000276136400009
Autor
Lima, L. S.
Caires, Flavio J.
Carvalho, C. T.
Siqueira, A. B.
Ionashiro, Massao
Resumen
Characterization, thermal stability and thermal decomposition of light trivalent lanthanide succinates, Ln(2)(C(4)H(4)O(4))(3)center dot nH(2)O (Ln = La to Gd, except Pm) were investigated employing simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), infrared spectroscopy, TG-FTIR system, elemental analysis and complexometry. The dehydration of the lanthanum and cerium compounds occurs in a single step, while for the praseodymium to gadolinium compounds the dehydration occurs in two consecutive steps. The thermal decomposition of the anhydrous compounds occurs in consecutive and/or overlapping steps, except for the cerium compound, with formation of the respective oxides, CeO(2), Pr(6)O(11) and Ln(2)O(3) (Ln = La, Nd to Gd), as final residue. The results also provided information concerning the denticity of the ligand and thermal behaviour of these compounds. (C) 2010 Elsevier BM. All rights reserved. Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)