Non-isothermal Decomposition Kinetics of Complexes [Sm(m-MBA)_3 phen]_2 and [Sm(o-MOBA)_3 phen]_2·2H_2O

摘要

In recent years, there has been considerable interest in complexes formed by lanthanide cations and various benzoate derivatives , due to their potential application in areas, such as extraction, separation, germicide preparation, catalysis, luminescence, and functional material preparation . As a continuation of the study on lanthanide carboxylate, samariumrncomplexes with α-methylbenzoic acid or o-methoxy-benzoic acid and 1,10-phenanthroline were synthesized and characterized by elemental analysis and IR spec-trometry. The thermal decomposition mechanisms of the two complexes were derived and the corresponding non-isothermal kinetics was studied using the Achar differential method , the MKN integral method, the non-linear isoconversional integral (NL-INT) , and differential (NL-DIF) method. The information of the thermodynamic properties of the complex is important to characterize and understand the properties of the coordination compound, which could eventually be useful in determining their potential application.