Thermal stability of the FeIIIEDTA complex in its monomeric form
Thermal degradation of the solid monomeric Na[FeEDTA(H2O)]·2H2O EDTA=ethylenediaminetetraacetate anion) complex was studied in air by simultaneous thermogravimetry and differential thermal analysis (TG/DTA) coupled on-line with a quadrupole mass spectrometer for evolved gas analysis (EGA-MS). The so...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
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Elsevier Science
2008
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0040603108002827# http://hdl.handle.net/20.500.11937/19569 |
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| author | Szilagyi, Petra Madarasz, J. Kuzmann, E. Vértes, A. Molnár, G. Bousseksou, A. Sharma, V. Homonnay, Z. |
| author_facet | Szilagyi, Petra Madarasz, J. Kuzmann, E. Vértes, A. Molnár, G. Bousseksou, A. Sharma, V. Homonnay, Z. |
| author_sort | Szilagyi, Petra |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Thermal degradation of the solid monomeric Na[FeEDTA(H2O)]·2H2O EDTA=ethylenediaminetetraacetate anion) complex was studied in air by simultaneous thermogravimetry and differential thermal analysis (TG/DTA) coupled on-line with a quadrupole mass spectrometer for evolved gas analysis (EGA-MS). The solid products were analysed by Mössbauer spectroscopy. A four-step decomposition was observed until 500 ?C by TG/DTA–EGA-MS, involving first the release of two molecules of crystal lattice water then one coordinatedwater molecule and above 200 ?C, the release of CO2 as a result of degradation of a carboxylate arm of the EDTA ligand. While releasing CO2, reduction of the ferric iron to ferrous iron was observed by Mössbauer spectroscopy. Two ferrous species have been found to form simultaneously which are assumed to be configurational isomers since their aerial oxidation resulted in the formation of the same -oxo dimeric iron(III) species. Reaction pathway for this oxidation is proposed. Finally, the organic residues are burnt out rapidly accompanied by a very sharp exothermic heat effect between 280 and 330 ?C; meanwhile magnetite is formed. |
| first_indexed | 2025-11-14T07:30:59Z |
| format | Journal Article |
| id | curtin-20.500.11937-19569 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:30:59Z |
| publishDate | 2008 |
| publisher | Elsevier Science |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-195692017-02-28T01:35:23Z Thermal stability of the FeIIIEDTA complex in its monomeric form Szilagyi, Petra Madarasz, J. Kuzmann, E. Vértes, A. Molnár, G. Bousseksou, A. Sharma, V. Homonnay, Z. TGA Fe-EDTA complex Thermal degradation Mechanism of decomposition MS-coupled evolved gas analysis Mössbauer spectroscopy Thermal degradation of the solid monomeric Na[FeEDTA(H2O)]·2H2O EDTA=ethylenediaminetetraacetate anion) complex was studied in air by simultaneous thermogravimetry and differential thermal analysis (TG/DTA) coupled on-line with a quadrupole mass spectrometer for evolved gas analysis (EGA-MS). The solid products were analysed by Mössbauer spectroscopy. A four-step decomposition was observed until 500 ?C by TG/DTA–EGA-MS, involving first the release of two molecules of crystal lattice water then one coordinatedwater molecule and above 200 ?C, the release of CO2 as a result of degradation of a carboxylate arm of the EDTA ligand. While releasing CO2, reduction of the ferric iron to ferrous iron was observed by Mössbauer spectroscopy. Two ferrous species have been found to form simultaneously which are assumed to be configurational isomers since their aerial oxidation resulted in the formation of the same -oxo dimeric iron(III) species. Reaction pathway for this oxidation is proposed. Finally, the organic residues are burnt out rapidly accompanied by a very sharp exothermic heat effect between 280 and 330 ?C; meanwhile magnetite is formed. 2008 Journal Article http://hdl.handle.net/20.500.11937/19569 http://www.sciencedirect.com/science/article/pii/S0040603108002827# Elsevier Science restricted |
| spellingShingle | TGA Fe-EDTA complex Thermal degradation Mechanism of decomposition MS-coupled evolved gas analysis Mössbauer spectroscopy Szilagyi, Petra Madarasz, J. Kuzmann, E. Vértes, A. Molnár, G. Bousseksou, A. Sharma, V. Homonnay, Z. Thermal stability of the FeIIIEDTA complex in its monomeric form |
| title | Thermal stability of the FeIIIEDTA complex in its monomeric form |
| title_full | Thermal stability of the FeIIIEDTA complex in its monomeric form |
| title_fullStr | Thermal stability of the FeIIIEDTA complex in its monomeric form |
| title_full_unstemmed | Thermal stability of the FeIIIEDTA complex in its monomeric form |
| title_short | Thermal stability of the FeIIIEDTA complex in its monomeric form |
| title_sort | thermal stability of the feiiiedta complex in its monomeric form |
| topic | TGA Fe-EDTA complex Thermal degradation Mechanism of decomposition MS-coupled evolved gas analysis Mössbauer spectroscopy |
| url | http://www.sciencedirect.com/science/article/pii/S0040603108002827# http://hdl.handle.net/20.500.11937/19569 |