Thermal degradation of coordination polymer [Cd(N-Boc-gly)(2)(H2O)(2)](n)
Abstract
Multi-step thermal degradation of coordination polymer [Cd(N-Boc-gly)(2)(H2O)(2)](n) in non-isothermal conditions was studied. The kinetic parameters were determined from the thermal decomposition data using the isoconversion and non-isoconversion techniques. It was shown that the coordination polymer is stable up to 60 C, when the multi-step process of thermal dehydration, followed by steps of degradation, starts. The kinetic triplet for the step of dehydration was established as f(alpha) = 3/2(1 - alpha)(2/3)[1 - (1 - alpha)(1/3)](-1). E-inv = 170.4 +/- 6.4 kJ mol(-1) and Z(inv) =2.6 x 10(23). The established kinetic model, known as "D3 model", was confirmed by application criteria defined by Malek, Perez-Maqueda et al. as well as Master plot method. Dehydration step is followed by two steps of dehydrated coordination polymer degradation. On the base of the dependence of Arrhenius parameters (E-a and Z) on conversion degree (alpha), the mechanisms of degradation were discussed. In th...is way it was shown that second and third steps of degradation of coordination polymer are complex involving more than one elementary step. The second step corresponds to the loss of two C6H5CH2O- fragments in two parallel steps. The third step of degradation, ascribed to the loss of two -C(=O)NHCH2- fragments, is complicated by changing kinetically to diffusion control. (C) 2011 Elsevier B.V. All rights reserved.
Keywords:
Coordination polymer / Thermal degradation kinetics / Non isothermal kineticsSource:
Thermochimica Acta, 2011, 525, 1-2, 25-30Publisher:
- Elsevier Science Bv, Amsterdam
Funding / projects:
- Interactions of natural products, their derivatives and coordination compounds with proteins and nucleic acids (RS-MESTD-Basic Research (BR or ON)-172055)
- Dynamics of nonlinear physicochemical and biochemical systems with modeling and predicting of their behavior under nonequilibrium conditions (RS-MESTD-Basic Research (BR or ON)-172015)
- Zero- to Three-Dimensional Nanostructures for Application in Electronics and Renewable Energy Sources: Synthesis, Characterization and Processing (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45007)
DOI: 10.1016/j.tca.2011.07.017
ISSN: 0040-6031
WoS: 000296824400004
Scopus: 2-s2.0-81155159815
Collections
Institution/Community
Hemijski fakultet / Faculty of ChemistryTY - JOUR AU - Šumar-Ristović, Maja AU - Anđelković, Katarina K. AU - Poleti, Dejan AU - Minić, Dragica M. PY - 2011 UR - https://cherry.chem.bg.ac.rs/handle/123456789/1217 AB - Multi-step thermal degradation of coordination polymer [Cd(N-Boc-gly)(2)(H2O)(2)](n) in non-isothermal conditions was studied. The kinetic parameters were determined from the thermal decomposition data using the isoconversion and non-isoconversion techniques. It was shown that the coordination polymer is stable up to 60 C, when the multi-step process of thermal dehydration, followed by steps of degradation, starts. The kinetic triplet for the step of dehydration was established as f(alpha) = 3/2(1 - alpha)(2/3)[1 - (1 - alpha)(1/3)](-1). E-inv = 170.4 +/- 6.4 kJ mol(-1) and Z(inv) =2.6 x 10(23). The established kinetic model, known as "D3 model", was confirmed by application criteria defined by Malek, Perez-Maqueda et al. as well as Master plot method. Dehydration step is followed by two steps of dehydrated coordination polymer degradation. On the base of the dependence of Arrhenius parameters (E-a and Z) on conversion degree (alpha), the mechanisms of degradation were discussed. In this way it was shown that second and third steps of degradation of coordination polymer are complex involving more than one elementary step. The second step corresponds to the loss of two C6H5CH2O- fragments in two parallel steps. The third step of degradation, ascribed to the loss of two -C(=O)NHCH2- fragments, is complicated by changing kinetically to diffusion control. (C) 2011 Elsevier B.V. All rights reserved. PB - Elsevier Science Bv, Amsterdam T2 - Thermochimica Acta T1 - Thermal degradation of coordination polymer [Cd(N-Boc-gly)(2)(H2O)(2)](n) VL - 525 IS - 1-2 SP - 25 EP - 30 DO - 10.1016/j.tca.2011.07.017 ER -
@article{ author = "Šumar-Ristović, Maja and Anđelković, Katarina K. and Poleti, Dejan and Minić, Dragica M.", year = "2011", abstract = "Multi-step thermal degradation of coordination polymer [Cd(N-Boc-gly)(2)(H2O)(2)](n) in non-isothermal conditions was studied. The kinetic parameters were determined from the thermal decomposition data using the isoconversion and non-isoconversion techniques. It was shown that the coordination polymer is stable up to 60 C, when the multi-step process of thermal dehydration, followed by steps of degradation, starts. The kinetic triplet for the step of dehydration was established as f(alpha) = 3/2(1 - alpha)(2/3)[1 - (1 - alpha)(1/3)](-1). E-inv = 170.4 +/- 6.4 kJ mol(-1) and Z(inv) =2.6 x 10(23). The established kinetic model, known as "D3 model", was confirmed by application criteria defined by Malek, Perez-Maqueda et al. as well as Master plot method. Dehydration step is followed by two steps of dehydrated coordination polymer degradation. On the base of the dependence of Arrhenius parameters (E-a and Z) on conversion degree (alpha), the mechanisms of degradation were discussed. In this way it was shown that second and third steps of degradation of coordination polymer are complex involving more than one elementary step. The second step corresponds to the loss of two C6H5CH2O- fragments in two parallel steps. The third step of degradation, ascribed to the loss of two -C(=O)NHCH2- fragments, is complicated by changing kinetically to diffusion control. (C) 2011 Elsevier B.V. All rights reserved.", publisher = "Elsevier Science Bv, Amsterdam", journal = "Thermochimica Acta", title = "Thermal degradation of coordination polymer [Cd(N-Boc-gly)(2)(H2O)(2)](n)", volume = "525", number = "1-2", pages = "25-30", doi = "10.1016/j.tca.2011.07.017" }
Šumar-Ristović, M., Anđelković, K. K., Poleti, D.,& Minić, D. M.. (2011). Thermal degradation of coordination polymer [Cd(N-Boc-gly)(2)(H2O)(2)](n). in Thermochimica Acta Elsevier Science Bv, Amsterdam., 525(1-2), 25-30. https://doi.org/10.1016/j.tca.2011.07.017
Šumar-Ristović M, Anđelković KK, Poleti D, Minić DM. Thermal degradation of coordination polymer [Cd(N-Boc-gly)(2)(H2O)(2)](n). in Thermochimica Acta. 2011;525(1-2):25-30. doi:10.1016/j.tca.2011.07.017 .
Šumar-Ristović, Maja, Anđelković, Katarina K., Poleti, Dejan, Minić, Dragica M., "Thermal degradation of coordination polymer [Cd(N-Boc-gly)(2)(H2O)(2)](n)" in Thermochimica Acta, 525, no. 1-2 (2011):25-30, https://doi.org/10.1016/j.tca.2011.07.017 . .