Thermal studies of Co(II), Ni(II) and Cu(II) complexes of N,N'-bis(3,5-Di-t-butylsalicylidene)ethylenediamine
[ X ]
Tarih
2009
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
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.
Açıklama
18th Annual Workshop and Exhibition of the Canadian-Thermal-Analysis-Society -- MAY 13-14, 2008 -- Mississauga, CANADA
Anahtar Kelimeler
activation energy, sterically hindered Schiff base, thermal decomposition kinetic, thermogravimetry
Kaynak
Journal of Thermal Analysis and Calorimetry
WoS Q Değeri
Q3
Scopus Q Değeri
Q1
Cilt
96
Sayı
1
