Synthesis,Characterization and Thermodecomposition Kinetics of Gd(Ⅲ) Complex With 2-Hydroxy-1-Naphthaldehyde-4-Aminoantipyrine

A new solid complex of Gd(Ⅲ) with Schiff base(HL) derived from 2-hydroxy-1-naphthaldehyde and 4-aminoantipyrine is synthesized and characterized by elemental analysis, IR, UV and molar conducivity analysis. The composition of the complex is confirmed to be ［Gd(HL)(C_2H_5OH)(H_2O)_2］(NO_3)_3.The thermodecomposition kinetics of the complex for the first stage and third stage is studied under non-isothermal condition by TG and DTG methods. The kinetic equations may be expressed as : d a/ d t=A ·e ~(-E/RT)·3/2(1-a)~(2/3)［1-(1-a)~(1/3)］~(-1), d a/ d t=A ·e ~(-E/RT)·1/2(1-a)［- ln (1-a)］~(-1)。