Abstract
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.
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The authors thank FAPESP, CNPq and CAPES foundations (Brazil) for financial support. This research was supported by resources supplied by the Center for Scientific Computing (NCC/GridUNESP) of the São Paulo State University (UNESP), Instituto de Química de Araraquara, UNESP—Campus de Araraquara.
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Gigante, A.C., Caires, F.J., Gomes, D.J.C. et al. Spectroscopic study and thermal behavior of trivalent lanthanides and yttrium(III) chelates of EDTA using TG-DSC, FTIR, and TG-DSC coupled to FTIR. J Therm Anal Calorim 115, 127–135 (2014). https://doi.org/10.1007/s10973-013-3284-z
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DOI: https://doi.org/10.1007/s10973-013-3284-z