Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
674955 | Thermochimica Acta | 2009 | 4 Pages |
Abstract
The kinetics of sublimation of bis(2,2,6,6-tetramethyl-3,5-heptanedionato)copper(II), [Cu(tmhd)2] was studied by non-isothermal and isothermal thermogravimetric (TG) methods. The non-isothermal sublimation activation energy values determined following the procedures of Friedman, Kissinger, and Flynn-Wall methods yielded 93 ± 5, 67 ± 2, and 73 ± 4 kJ molâ1, respectively and the isothermal sublimation activation energy was found to be 97 ± 3 kJ molâ1 over the temperature range of 375-435 K. The dynamic TG run proved the complex to be completely volatile and the equilibrium vapor pressure (pe)T of the complex over the temperature range of 375-435 K determined by a TG-based transpiration technique, yielded a value of 96 ± 2 kJ molâ1 for its standard enthalpy of sublimation (ÎsubH°).
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
M. George Johnson, J. Selvakumar, K.S. Nagaraja,