Kinetic analysis of thermal decomposition of some Co-complexes of three unsymmetrical vic-dioximes ligands: Model fitting and model-free method

O. Sahin*, E. Tas, H. Dolas

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The thermal decomposition of three new reagent cyclohexylamine-p- tolylglyoxime (L1H2), tertiarybutyl amine-p-tolylglyoxime (L2H2) and secondary butylamine-p-tolylglyoxime (L 3H2 and their Co-complexes were studied by both isothermal and nonisothermal methods. As expected, the complex structure of Co-complexes, different steps with different activation energies were realized in decomposition process. Model-fitting and model-free kinetic approaches were applied to nonisothermal and isothermal data. The kinetic triplet (f(α), A and E) related to nonisothermal model-fitting method can not be meaningfully compared with values obtained from isothermal method. The complex nature of the multi-step process of the studied compounds was more easily revealed using a wider temperature range in nonisothermal isoconversional method.

Original languageEnglish
Pages (from-to)123-131
Number of pages9
JournalJournal of Thermal Analysis and Calorimetry
Volume89
Issue number1
DOIs
Publication statusPublished - Jul 2007
Externally publishedYes

Keywords

  • Arrhenius parameter
  • Co(II) complexes
  • Kinetic analysis
  • Model-fitting and model-free methods
  • Vic-dioxime

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