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Kinetics and thermal decomposition of Fe(III) and UO2(II) complexes with embelin (2,5-dihydroxy-3-undecyl-P-benzoquinone)

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The thermal decomposition of the complexes: [Fe(C17H24O4)1.5·2H2O]n and [UO2(C17H24O4·2H2O]n, and evaluation of kinetic parameters (E, Z andΔS) by making use of Piloyan-Novikova, Coats-Redfern and Horowitz-Metzger equations are reported. The complexes are found to decompose in three well defined steps involving random nucleation mechanism. The intermediates formed during decomposition usually undergo further decomposition without remaining stable over a considerable range of temperature.


Es wird über die thermische Zersetzung der Komplexe [Fe(C17H24O4)1.5·2H2O]n und [UO2(C17H24O4)·2H2O]n und über die Ermittlung der kinetischen Parameter durch Anwendung der Piloyan-Novikova, der Coats-Redfern und der Horowitz-Metzger-Gleichungen berichtet. Die Komplexe werden in drei gut definierten Stufen mit Random-Keimbildungsmechanismus zersetzt. Die während der Zersetzung gebildeten Zwischenprodukte unterliegen stets einer weiteren Zersetzung, ohne in einem erheblichen Temperaturbereich Stabilität zu zeigen.

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Dhar, M.L., Singh, O. Kinetics and thermal decomposition of Fe(III) and UO2(II) complexes with embelin (2,5-dihydroxy-3-undecyl-P-benzoquinone). Journal of Thermal Analysis 37, 259–265 (1991).

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