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Journal of Chemistry
Volume 2013 (2013), Article ID 350937, 5 pages
http://dx.doi.org/10.1155/2013/350937
Research Article

Sublimation Kinetic Studies of the Complex

1Department of Chemistry, TJS Engineering College, Kavaraipettai, Gummudipoondi 601 203, India
2Department of Chemistry, Loyola Institute of Frontier Energy (LIFE), Loyola College, Chennai 600 034, India

Received 14 June 2012; Revised 22 August 2012; Accepted 4 September 2012

Academic Editor: Xu-Liang Cao

Copyright © 2013 T. S. Arul Jeevan and K. S. Nagaraja. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

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 , , , and  kJ/mol, respectively, and the isothermal sublimation activation energy was found to be  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 deceleration type.