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Thermal decomposition kinetics of Schiff base complexes of copper(II) and palladium(II)

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Abstract

Thermogravimetric (TG), derivative thermogravimetric (DTG) and differential thermal analysis (DTA) curves of CuL2 and Pd(LH)2Cl2 (LH=salicylidene-2-aminofluorene and 2-hydroxy-1-naphthalidene-2-aminofluorene) in air are studied. Mass loss considerations at the main decomposition stages indicate conversion of the complex to oxides. Mathematical analysis of TG data shows that first order kinetics are applicable in all cases. Kinetic parameters (energy and entropy of activation and preexponential factor) are reported.

Zusammenfassung

In Luft aufgenommene thermogravimetrische (TG), differentialthermogravimetrische (DTG) und differentialthermoanalytische (DTA) Kurven von CuL2 und Pd(LH)2Cl2 (LH=Salicyliden-2-aminofluoren und 2-Hydroxy-1-naphthaliden-2-aminofluoren) werden untersucht. Aus den Massenverlusten während der Hauptschritte der Zersetzung folgt, daß die Komplexe zu den Oxiden abgebaut werden. Die mathematische Analyse der TG-Daten ergibt in allen Fällen eine Reaktionskinetik erster Ordnung. Kinetische Parameter (Energie und Entropie der Aktivierung und präexponentieller Faktor) werden angegeben.

Резюме

Методами ТГ, ДТГ и ДТА и зучено в атмосфере воздуха термическое разложение комплексов CuL2 и Pd(LH)2Cl2, где LH — салицилиден-2-аминоф луорен и 2-окси-1-нафталиден2-ам инофлуорен. 2-окси-1-нафталиден2-амин офлуорен. Потеря веса на всех гл авных стадиях разлож ения указывает на их полно е превращение до окисл ов. Математический ан ализ данных показал, что для всех с лучаев применим первый поря док реакционной кине тики. Приведены такие кине тические параметры, как энергия и энтропи я активации и предэкспоненциальн ый множитель.

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Authors and Affiliations

  1. Department of Chemistry, University of Calicut, 673 635, India

    V. Indira & G. Parameswaran

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  1. V. Indira
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  2. G. Parameswaran
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Indira, V., Parameswaran, G. Thermal decomposition kinetics of Schiff base complexes of copper(II) and palladium(II). Journal of Thermal Analysis 32, 1151–1162 (1987). https://doi.org/10.1007/BF01905170

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  • DOI: https://doi.org/10.1007/BF01905170

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