Synthesis, characterization and thermal decomposition kinetics of unsymmetrical schiff base complex with samarium (III)

A new unsymmetrical solid Schiff base (HLLi) was synthesized using L-lysine, salicylidene and furfural. Solid samarium (III) complex of this ligand [Sm(HL)(NO3)](NO3)·2H2O was prepared and characterized by elemental analyses, IR, UV and molar conductance. The thermal decomposition kinetics of the complex for the second stage was studied under non-isothermal condition by TG and DTG methods. The kinetic equation may be expressed as: dα/dt=A·e-E/RT. (1-α)2. The kinetic parameters (E, A), activation entropy ΔS≠ and activation free-energy ΔG≠ were also gained, E = 213. 8 kJ·mol-1, lnA = 43.93, ΔS≠ = 115.2 J·mol-1·K-1, ΔG≠ = 150.1 kJ·mol-1.