Sublimation Kinetic Studies of the Zr(tmhd)4 Complex
The thermal behaviour of tetrakis(2,2,6,6-tetramethyl-3,5-heptanedionato)zirconium(IV), [Zr(tmhd)4] was investigated by nonisothermal and isothermal thermogravimetric methods in a high pure nitrogen atmosphere. The influence of the heating rate in dynamic measurements (6, 8, 10, and 12°C/min) on act...
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Wiley
2013-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2013/350937 |
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| author | T. S. Arul Jeevan K. S. Nagaraja |
| author_facet | T. S. Arul Jeevan K. S. Nagaraja |
| author_sort | T. S. Arul Jeevan |
| collection | DOAJ |
| description | The thermal behaviour of tetrakis(2,2,6,6-tetramethyl-3,5-heptanedionato)zirconium(IV), [Zr(tmhd)4] was investigated by nonisothermal and isothermal thermogravimetric methods in a high pure nitrogen atmosphere. The influence of the heating rate in dynamic measurements (6, 8, 10, and 12°C/min) on activation energy was also studied. The nonisothermal sublimation activation energy values determined following the procedures of Arrhenius, Coats and Redfern, Kissinger, and Flynn-Wall yielded 76±5, 92±2, 81±8, and 72±7 kJ/mol, respectively, and the isothermal sublimation activation energy was found to be 87±4 kJ/mol over the temperature range of 411–462 K. Different reaction mechanisms were used to compare with this value. Analysis of the experimental results suggested that the actual reaction mechanism was an Rn deceleration type. |
| format | Article |
| id | doaj-art-701e5e8e4bf64723b9dd298b64c939e5 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-701e5e8e4bf64723b9dd298b64c939e52025-08-20T03:34:00ZengWileyJournal of Chemistry2090-90632090-90712013-01-01201310.1155/2013/350937350937Sublimation Kinetic Studies of the Zr(tmhd)4 ComplexT. S. Arul Jeevan0K. S. Nagaraja1Department of Chemistry, TJS Engineering College, Kavaraipettai, Gummudipoondi 601 203, IndiaDepartment of Chemistry, Loyola Institute of Frontier Energy (LIFE), Loyola College, Chennai 600 034, IndiaThe thermal behaviour of tetrakis(2,2,6,6-tetramethyl-3,5-heptanedionato)zirconium(IV), [Zr(tmhd)4] was investigated by nonisothermal and isothermal thermogravimetric methods in a high pure nitrogen atmosphere. The influence of the heating rate in dynamic measurements (6, 8, 10, and 12°C/min) on activation energy was also studied. The nonisothermal sublimation activation energy values determined following the procedures of Arrhenius, Coats and Redfern, Kissinger, and Flynn-Wall yielded 76±5, 92±2, 81±8, and 72±7 kJ/mol, respectively, and the isothermal sublimation activation energy was found to be 87±4 kJ/mol over the temperature range of 411–462 K. Different reaction mechanisms were used to compare with this value. Analysis of the experimental results suggested that the actual reaction mechanism was an Rn deceleration type.http://dx.doi.org/10.1155/2013/350937 |
| spellingShingle | T. S. Arul Jeevan K. S. Nagaraja Sublimation Kinetic Studies of the Zr(tmhd)4 Complex Journal of Chemistry |
| title | Sublimation Kinetic Studies of the Zr(tmhd)4 Complex |
| title_full | Sublimation Kinetic Studies of the Zr(tmhd)4 Complex |
| title_fullStr | Sublimation Kinetic Studies of the Zr(tmhd)4 Complex |
| title_full_unstemmed | Sublimation Kinetic Studies of the Zr(tmhd)4 Complex |
| title_short | Sublimation Kinetic Studies of the Zr(tmhd)4 Complex |
| title_sort | sublimation kinetic studies of the zr tmhd 4 complex |
| url | http://dx.doi.org/10.1155/2013/350937 |
| work_keys_str_mv | AT tsaruljeevan sublimationkineticstudiesofthezrtmhd4complex AT ksnagaraja sublimationkineticstudiesofthezrtmhd4complex |