Dehydration and decomposition kinetics of complexes of some rare earth (La, Nd, Dy and Eu) picrates and 2,2′-dithiobis (pyridine-N-oxide)

The dehydration and decomposition behavior of some rare earth complexes is analyzed under a kinetic point of view. The experimental data were obtained thermogravimetrically and the kinetic parameters are calculated by a non-linear method. The results are similar for La, Nd and Dy but different in the case of Eu. The relative mass loss and its first derivative curves as a function of temperature are compared in order to evaluate the quality of the parameters obtained.