Abstract

Abstract Complexes of rare earth bromides with glycine, REBr 3 ·3Gly·3H 2 O (RE is Ce, Pr, Sm, Eu, Gd, Tb, Dy and Y; Gly is glycine) have been synthesized and characterized by means of chemical analysis, elemental analysis, molar conductivity, thermogravimetry, IR spectra and X-ray diffractometry. The IR spectra of the above complexes indicate that in the complexes glycine is coordinated to rare earth cations through oxygens of the carboxylic group. The thermal decomposition processes of these complexes were studied by means of TG and DTG techniques from ambient to 1000°C. The kinetics of thermal decomposition of these complexes were studied under non-isothermal conditions by TG techniques. The kinetic parameters (activation energy, E , and pre-exponential factor, A ) and the most probable mechanisms of thermal decomposition were obtained from analysis of the TG and DTG curves by using combined integral and differential methods.

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