Artículos de revistas
Synthesis, characterization, thermal behavior, and DFT calculation of solid 1,4-bis(3-carboxy-3-oxo-prop-1-enyl) benzene of some trivalent lanthanides
Fecha
2014-10-01Registro en:
Journal Of Thermal Analysis And Calorimetry. Dordrecht: Springer, v. 118, n. 1, p. 499-509, 2014.
1388-6150
10.1007/s10973-014-4016-8
WOS:000342213500052
8460531302083773
9507306328110201
4346651950953280
0000-0002-5001-5038
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
Solid-state Ln(2)L(3)center dot nH(2)O compounds, where Ln represents trivalent lanthanides (from Eu to Lu and Y, except Dy) and L is 1,4-bis(3-carboxy-3-oxo-prop-1-enyl) benzene, have been synthesized. Simultaneous thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry, X-ray powder diffractometry, infrared spectroscopy, and complexometry were used to characterize and to study the thermal behavior of these compounds. The dehydration of the compounds occurred until at 445 K (Y), at 440 K (Tb), and at 489 K (Eu, Gd, Ho, Er, Tm, Yb, and Lu). After dehydration, the DTA curves showed two other thermal events that are associated with the thermal decomposition of the compounds with formation of the respective oxides. The results also provided information about the composition, dehydration, crystallinity, and thermal decomposition of these compounds. Furthermore, the theoretical and experimental spectroscopic data suggest the possible modes of coordination of the ligand with the metals.