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Study of The Thermal Decomposition of Some New Cyanine Dispersed Dyes

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Abstract

The structure of the studied compounds was confirmed by elemental analysis, IR and NMR. TG and DTG data were used to study the kinetics of the thermal decomposition process of some new cyanine dispersed dyes derived from 2-[(p-chloro)-styryl]-6-[5-(3-aryl-rhodanine)]-1,2-dihydropyridine. The reaction was found to follow first order mechanism. The activation energy Ea was calculated and used to calculate the thermodynamic parameters enthalpy change (ΔH*), entropy change (ΔS*), and free energy change (ΔG*), related to the thermal decomposition process. Two different calculation methods including Coats—Redfern and Chatterjee were applied to evaluate thekinetic and thermodynamic parameters. Quantum study was performed to support both the structure and the thermal data.

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Authors and Affiliations

  1. Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt

    M. E. M. Emam, I. M. M. Kenawy & M. A. H. Hafez

Authors
  1. M. E. M. Emam
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  2. I. M. M. Kenawy
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  3. M. A. H. Hafez
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Emam, M.E.M., Kenawy, I.M.M. & Hafez, M.A.H. Study of The Thermal Decomposition of Some New Cyanine Dispersed Dyes. Journal of Thermal Analysis and Calorimetry 63, 75–83 (2001). https://doi.org/10.1023/A:1010128201853

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