Kinetics and mechanism of degradation of Co(II)-N-benzyloxycarbonylglycinato complex
Samo za registrovane korisnike
2012
Autori
Minić, Dragica M.Šumar-Ristović, Maja
Miodragović Đenana U.
Anđelković, Katarina K.
Poleti, Dejan
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
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 complica...ted 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.
Ključne reči:
Co-N-benzyloxycarbonylglycinato complex / Activation energy / Dehydration / Degradation / KineticsIzvor:
Journal of Thermal Analysis and Calorimetry, 2012, 107, 3, 1167-1176Izdavač:
- Springer, Dordrecht
Finansiranje / projekti:
- Dinamika nelinearnih fizičkohemijskih i biohemijskih sistema sa modeliranjem i predviđanjem njihovih ponašanja pod neravnotežnim uslovima (RS-172015)
- Interakcije prirodnih proizvoda, njihovih derivata i kompleksnih jedinjenja sa proteinima i nukleinskim kiselinama (RS-172055)
- 0-3D nanostrukture za primenu u elektronici i obnovljivim izvorima energije: sinteza, karakterizacija i procesiranje (RS-45007)
DOI: 10.1007/s10973-011-1368-1
ISSN: 1388-6150
WoS: 000302703400039
Scopus: 2-s2.0-84870801694
Institucija/grupa
Tehnološko-metalurški fakultetTY - 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 . .