Synthesis and thermal decomposition kinetics of lanthanum(iii) complex with unsymmetrical Schiff base

A new unsymmetrical solid Schiff base (LLi) was synthesized using L-lysine, salicylaldehyde and furfural. Solid lanthanum(III) complex of this ligand [LaL(NO3)]NO3 center dot 2H(2)O have been 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 : d alpha/dt = A center dot e(.E/RT)center dot (1-alpha)(2) The kinetic parameters(E, A), activation entropy Delta S-not equal and activation free-energy Delta G(not equal) were also gained, E = 212.7 kJ/mol Delta InA =44.12, square S-not equal=116.8 J/mol center dot K Delta Delta G(not equal)=148.1 kJ/mol.