Research on the thermal decomposition of the bioinorganic complex of europium and l-glutamine by Mössbauer spectroscopy

Abstract Mossbauer spectroscopy has been used to investigate the thermal decomposition of the bioinorganic complex of europium and l -glutamine. The Mossbauer parameters can demonstrate that the water molecules in the complex and the chlorine anion in the hydrogen chloride molecule, dissociated from the complex below 200°C, are not linked directly to the europium atom. The thermal decomposition process of the complex is discussed and a possible coordination model for the europium l -glutamine complex is also proposed on the basis of the thermogravimetric and derivative thermogravimetric curves, and from some evidence obtained from the Mossbauer effects of some decomposition products of the complex.