15- The thermal decomposition studies and thermal degradation kinetics of mononuclear and dinuclear complexes of macrocyclic polyethers with NaI and KI

Fatih DOGAN^a,b,*, Mustafa YILDIZ^a

^aÇanakkale Onsekiz Mart  University, Faculty of Sciences and Arts, Department of Chemistry,17100, Çanakkale, Turkey

^bEge University, Faculty of Science, Department of Chemistry, 35100, İzmir, Turkey

*Correspondences author:E mail: fatihdogan_tr@hotmail.com

Abstract: The TG and DTA study of the complexes [(K⁺ÌH1-22-1H)I^-] (1), [(Na⁺ÌH1-22-1H)I^-] (2), [(2K⁺ÌH1-22-1H)2I^-.H₂O] (3) and [(2Na⁺ÌH1-22-1H)2I^-.H₂O] (4) was carried out under  a dynamic air atmosphere. The kinetics of the each step of thermal decomposition were evaluated from the dynamic weight loss data by means of Coats-Redfern, MacCallum-Tanner, Madhusudanan-Krishnan-Ninan (by approximation and series solution) and van Krevelen methods. The D_n , R_n and A_n models were selected as the models best fitting the experimental TG curves. The values of activation energy, E, and frequency factor, A, of the thermal decomposition were calculated.

Keywords: Mononuclear and dinuclear complexes, poly ethers , thermal degradation kinetics

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