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Öğe Thermal studies of Co(II), Ni(II) and Cu(II) complexes of N,N'-bis(3,5-Di-t-butylsalicylidene)ethylenediamine(Springer, 2009) Dogan, F.; Ulusoy, M.; Ozturk, O.-F.; İsmet, Kaya; Salih, B.The thermal decomposition kinetics of sterically hindered salen type ligand (L) and its metal complexes [M=Co(II), Ni(II), Cu(II)] were investigated by thermogravimetric analysis. A direct insertion probe-mass spectrometer (DIP-MS) was used for the characterization of metal complexes of L and all fragmentations and stable ions were characterized. The thermogravimetry and differential thermogravimetry (TG-DTG) plots of salen type salicylaldimine ligand and complexes showed a single step. The kinetic analysis of thermogravimetric data was performed by using the invariant kinetic parameter method (IKP). The values of the invariant activation energy, E (inv) and the invariant pre-exponential factor, A (inv), were calculated by using Coats-Redfern (CR) method. The thermal stabilities and activation energies of metal complexes of sterically hindered salen type ligand (L) were found as Co(II)> Cu(II)> Ni(II)> L and E (Cu)> E (Ni)> E (Co)> L. Also, the probabilities of decomposition functions were investigated. The diffusion functions (D (n)) are most probable for the thermal decomposition of all complexes.
