Artigo
Solid-state compounds of 2-methoxybenzylidenepyruvate and 2-methoxycinnamyllidenepyruvate with thorium (IV) Preparation and thermal studies
Fecha
2011-12-01Registro en:
Journal of Thermal Analysis and Calorimetry. Dordrecht: Springer, v. 106, n. 3, p. 643-649, 2011.
1388-6150
10.1007/s10973-010-1262-2
WOS:000297371200002
Autor
Universidade Estadual de Ponta Grossa (UEPG)
Universidade Estadual Paulista (Unesp)
Universidade Federal da Grande Dourados (UFGD)
Resumen
Solid-state compounds of general formula ThL(4)center dot nH(2)O, where L represents 2-methoxybenzylidenepyruvate and 2-methoxycynamylidenepyruvate, were synthesized. Complexometric titrations with EDTA, thermogravimetry (TG), differential thermal analysis (DTA), X-ray powder diffractometry, elemental analysis (EA), and infrared spectroscopy have been employed to characterize and to study the thermal behavior of these compounds in dynamic air atmosphere. The results led to informations about the composition, dehydration, crystallinity, and thermal decomposition of the isolated compounds. The performed molecular calculations in this study were done using the Gaussian 03 routine. Theoretical calculations help in interpretations of FT-IR spectra supplying structural and physicochemical parameters.