Thermal behavior of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand was investigated using the results of TG, DSC and DTG analysis obtained at different heating rates (2.5 to 30 A degrees C min(-1)), from room temperature to about 900 A degrees C. Mechanisms of complex degradation, as well as enthalpies of the degradation processes were determined. It is shown that thermal stability of investigated complexes correlates with their crystal structures, especially with the presence of crystallization and coordinated water molecules. The values of dehydration enthalpies are discussed and correlated with composition of the complexes. Kissinger's, Ozawa's, and Friedman's isoconversion methods were used for the determination of kinetic parameters: the pre-exponential factor A and the apparent activation energy E (a). For all three complexes and all steps of degradation, the values of kinetics parameters obtained by Kissinger's and Ozawa's methods are in good agree...ment. The results obtained by Friedman's method showed that some decomposition steps are simple and some others are complex ones.
Keywords:
Metal complexes / N-benzyloxycarbonylglycine / Thermal analysis / Thermal stability
Source:
Journal of Thermal Analysis and Calorimetry, 2010, 102, 1, 83-90
TY - JOUR
AU - Šumar-Ristović, Maja
AU - Minić, Dragica M.
AU - Poleti, Dejan
AU - Miodragović, Zoran
AU - Miodragović Đenana U.
AU - Anđelković, Katarina K.
PY - 2010
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5620
AB - Thermal behavior of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand was investigated using the results of TG, DSC and DTG analysis obtained at different heating rates (2.5 to 30 A degrees C min(-1)), from room temperature to about 900 A degrees C. Mechanisms of complex degradation, as well as enthalpies of the degradation processes were determined. It is shown that thermal stability of investigated complexes correlates with their crystal structures, especially with the presence of crystallization and coordinated water molecules. The values of dehydration enthalpies are discussed and correlated with composition of the complexes. Kissinger's, Ozawa's, and Friedman's isoconversion methods were used for the determination of kinetic parameters: the pre-exponential factor A and the apparent activation energy E (a). For all three complexes and all steps of degradation, the values of kinetics parameters obtained by Kissinger's and Ozawa's methods are in good agreement. The results obtained by Friedman's method showed that some decomposition steps are simple and some others are complex ones.
PB - Springer, Dordrecht
T2 - Journal of Thermal Analysis and Calorimetry
T1 - Thermal stability and degradation of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand
EP - 90
IS - 1
SP - 83
VL - 102
DO - 10.1007/s10973-010-0748-2
ER -
@article{
author = "Šumar-Ristović, Maja and Minić, Dragica M. and Poleti, Dejan and Miodragović, Zoran and Miodragović Đenana U. and Anđelković, Katarina K.",
year = "2010",
abstract = "Thermal behavior of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand was investigated using the results of TG, DSC and DTG analysis obtained at different heating rates (2.5 to 30 A degrees C min(-1)), from room temperature to about 900 A degrees C. Mechanisms of complex degradation, as well as enthalpies of the degradation processes were determined. It is shown that thermal stability of investigated complexes correlates with their crystal structures, especially with the presence of crystallization and coordinated water molecules. The values of dehydration enthalpies are discussed and correlated with composition of the complexes. Kissinger's, Ozawa's, and Friedman's isoconversion methods were used for the determination of kinetic parameters: the pre-exponential factor A and the apparent activation energy E (a). For all three complexes and all steps of degradation, the values of kinetics parameters obtained by Kissinger's and Ozawa's methods are in good agreement. The results obtained by Friedman's method showed that some decomposition steps are simple and some others are complex ones.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Thermal stability and degradation of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand",
pages = "90-83",
number = "1",
volume = "102",
doi = "10.1007/s10973-010-0748-2"
}
Šumar-Ristović, M., Minić, D. M., Poleti, D., Miodragović, Z., Miodragović Đenana U.,& Anđelković, K. K.. (2010). Thermal stability and degradation of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 102(1), 83-90.
https://doi.org/10.1007/s10973-010-0748-2
Šumar-Ristović M, Minić DM, Poleti D, Miodragović Z, Miodragović Đenana U., Anđelković KK. Thermal stability and degradation of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand. in Journal of Thermal Analysis and Calorimetry. 2010;102(1):83-90.
doi:10.1007/s10973-010-0748-2 .
Šumar-Ristović, Maja, Minić, Dragica M., Poleti, Dejan, Miodragović, Zoran, Miodragović Đenana U., Anđelković, Katarina K., "Thermal stability and degradation of Co(II), Cd(II), and Zn(II) complexes with N-benzyloxycarbonylglycinato ligand" in Journal of Thermal Analysis and Calorimetry, 102, no. 1 (2010):83-90,
https://doi.org/10.1007/s10973-010-0748-2 . .
