SYNTHESIS AND KINETICS OF THERMAL-DECOMPOSITION OF COMPLEXES OF RARE-EARTH BROMIDES WITH GLYCINE

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 sy nthesized and characterized by means of chemical analysis, elemental a nalysis, molar conductivity, thermogravimetry, IR spectra and X-ray di ffractometry. The IR spectra of the above complexes indicate that in t he complexes glycine is coordinated to rare earth cations through oxyg ens of the carboxylic group. The thermal decomposition processes of th ese complexes were studied by means of TG and DTG techniques from ambi ent to 1000 degrees C. The kinetics of thermal decomposition of these complexes were studied under non-isothermal conditions by TG technique s. The kinetic parameters (activation energy, E, and pre-exponential f actor, A) and the most probable mechanisms of thermal decomposition we re obtained from analysis of the TG and DTG curves by using combined i ntegral and differential methods.