Cobalt(III) aminoacidate bis-phenanthroline chlorides: preparation and characterisation by thermal analysis and other analytical methods

Abstract: The thermal properties of some mixed complexes of Co(III) with omicron-phenanthroline and several amino acids were determined by thermogravimetry (TG) and differential thermal analysis (DTA). The thermal stability derived from decomposition temperatures is discussed in terms of the molecular properties of the amino acids which affect the distribution of the intermolecular bonds in the solid lattice. With reference to the weight losses and IR spectra of the heated compounds, the thermal decomposition pathways of these complexes were also determined. Modifications to the methods of preparation cited in the literature were also proposed to increase the yields and to simplify operating procedures.