Spectroscopic study and thermal behavior of trivalent lanthanides and yttrium(III) chelates of EDTA using TG-DSC, FTIR, and TG-DSC coupled to FTIR

• Published in: Journal of thermal analysis and calorimetry Vol. 115; no. 1; pp. 127 - 135
• Main Authors: Gigante, A. C., Caires, F. J., Gomes, D. J. C., Lima, L. S., Treu-Filho, O., Pivatto, M., Ionashiro, M.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 2014; Springer
• Subjects: Analytical Chemistry; Calorimetry; Chelates; Chemistry; Chemistry and Materials Science; Infrared spectroscopy; Inorganic Chemistry; Measurement Science and Instrumentation; Physical Chemistry; Polymer Sciences; Rare earth metals; Trivalent lanthanides and yttrium; Evolved gases; EDTA; Thermal behavior; TG-FTIR
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-013-3284-z

Solid-state compounds of yttrium and lanthanide chelates of ethylenediaminetetraacetic acid have been synthesized. Simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC), theoretical and experimental infrared spectroscopy (FTIR), elemental analysis, complexometry and TG-DSC coupled to FTIR were used to characterize and to study the thermal decomposition of these compounds. The results provided information about the composition, dehydration, thermal stability, thermal decomposition and identification of gaseous products evolved during the thermal decomposition of these compounds. The theoretical and experimental spectroscopic data suggest the possible modes of coordination of the ligand with the lanthanum and terbium metal ions.