Preparation and Thermal Decomposition Kinetics of Copper(II) Complex with ۱-(۶-Hydroxynaphthalen-۲-yl)butane-۱,۳-dione

A complex of Cu(II) with ۱-(۶-HydroxyNaphthalen-۲-yl) Butane-۱,۳-Dione (HNBD) was synthesized and characterized by elemental analysis, IR, UV and DTA-TG-DTG techniques.    IR spectra as well as UV-visible absorption measurements indicated that Cu(II) ion was coordinated to the HNBD ligand. The TG-DTA-DTG curves showed that thermal decomposition of the anhydrous complex was a two-stage process and the residue of decomposition was CuO. The decomposition mechanism and non-isothermal kinetic parameters of the complex were obtained from the analysis of TG-DTG data using three kinds of integral methods (Coat-Redfern equation, HM equation, MKN equation) and differential method (Achar equation). The results indicate that the kinetic equations with parameters describing the thermal decomposition reaction are  with E = ۴۱۷.۷۸ kJ/mol, A = ۳.۵۳´۱۰۳۸/s, DS = ۴۸۷.۵۵ J/K·mol and n =۳ for the first stage,  with E = ۸۸.۷۶ kJ/mol, A = ۴.۷۴´۱۰۵, DS = -۱۴۴.۵۹ J/K/mol  and n =۲ for the second stage.

کلیدواژه ها:

Thermal decomposition kinetics ، DTA-TG-DTG ، Cu(II) complex ، ۱-(۶-hydroxynaphthalen-۲-yl) butane-۱ ، ۳-dione