TY  - JOUR
AU  - Minić, Dragica M.
AU  - Šumar-Ristović, Maja
AU  - Miodragović Đenana U.
AU  - Anđelković, Katarina K.
AU  - Poleti, Dejan
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5695
AB  - The kinetics of multi-step thermal degradation of Co(II) complex with N-benzyloxycarbonyl glycinato ligand [Co(N-Boc-gly)(2)(H2O)(4)]center dot 2H(2)O, in non-isothermal conditions was studied using isoconversional and non-isoconversional methods. The degradation of complex occurs in three well-separated steps involving the loss of water molecules in first step followed by two degradation steps of dehydrated complex. The dependence of Arrhenius parameters on conversion degree showed that all observed steps of thermal degradation are very complex, involving more than one elementary step, as can be expected for most solid-state heterogeneous reactions with solid reactants and solid and gaseous products. It was shown that step 1, corresponding to the dehydration, involves a series of competitive dehydration steps of differently bound water molecules complicated by diffusion. Second step involves two parallel reactions related to the loss of two identical C6H5CH2O-ligand fragments complicated by the presence of products in gaseous state. Further degradation in step 3 corresponds to complex process with a change in the limiting stage, in this case from the kinetic to the diffusion regime, connected with the presence of gaseous products diffusing through the solid product.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Kinetics and mechanism of degradation of Co(II)-N-benzyloxycarbonylglycinato complex
EP  - 1176
IS  - 3
SP  - 1167
VL  - 107
DO  - 10.1007/s10973-011-1368-1
ER  - 

@article{
author = "Minić, Dragica M. and Šumar-Ristović, Maja and Miodragović Đenana U. and Anđelković, Katarina K. and Poleti, Dejan",
year = "2012",
abstract = "The kinetics of multi-step thermal degradation of Co(II) complex with N-benzyloxycarbonyl glycinato ligand [Co(N-Boc-gly)(2)(H2O)(4)]center dot 2H(2)O, in non-isothermal conditions was studied using isoconversional and non-isoconversional methods. The degradation of complex occurs in three well-separated steps involving the loss of water molecules in first step followed by two degradation steps of dehydrated complex. The dependence of Arrhenius parameters on conversion degree showed that all observed steps of thermal degradation are very complex, involving more than one elementary step, as can be expected for most solid-state heterogeneous reactions with solid reactants and solid and gaseous products. It was shown that step 1, corresponding to the dehydration, involves a series of competitive dehydration steps of differently bound water molecules complicated by diffusion. Second step involves two parallel reactions related to the loss of two identical C6H5CH2O-ligand fragments complicated by the presence of products in gaseous state. Further degradation in step 3 corresponds to complex process with a change in the limiting stage, in this case from the kinetic to the diffusion regime, connected with the presence of gaseous products diffusing through the solid product.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Kinetics and mechanism of degradation of Co(II)-N-benzyloxycarbonylglycinato complex",
pages = "1176-1167",
number = "3",
volume = "107",
doi = "10.1007/s10973-011-1368-1"
}

Minić, D. M., Šumar-Ristović, M., Miodragović Đenana U., Anđelković, K. K.,& Poleti, D.. (2012). Kinetics and mechanism of degradation of Co(II)-N-benzyloxycarbonylglycinato complex. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 107(3), 1167-1176.
https://doi.org/10.1007/s10973-011-1368-1

Minić DM, Šumar-Ristović M, Miodragović Đenana U., Anđelković KK, Poleti D. Kinetics and mechanism of degradation of Co(II)-N-benzyloxycarbonylglycinato complex. in Journal of Thermal Analysis and Calorimetry. 2012;107(3):1167-1176.
doi:10.1007/s10973-011-1368-1 .

Minić, Dragica M., Šumar-Ristović, Maja, Miodragović Đenana U., Anđelković, Katarina K., Poleti, Dejan, "Kinetics and mechanism of degradation of Co(II)-N-benzyloxycarbonylglycinato complex" in Journal of Thermal Analysis and Calorimetry, 107, no. 3 (2012):1167-1176,
https://doi.org/10.1007/s10973-011-1368-1 . .

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 . .