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Preparation, thermal decomposition process and kinetics for terbiump-methoxybenzoate ternary complex with 1,10-phenanthroline

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Abstract

The complex of [Tb2(p-MOBA)6(PHEN)2] (p-MOBA=C8H7O3,p-methoxybenzoate; PHEN=C12H8N2, 1,10-phenanthroline) was prepared and characterized by elemental analysis and IR spectroscopy. The thermal behavior of Tb2(p-MOBA)6(PHEN)2 in a static air atmosphere was investigated by TG-DTG, DTA, SEM and IR techniques. By the kinetic method of processing thermal analysis data put forward by Malek et al., it is defined that the kinetic model for the first-step thermal decomposition is SB(m,n). The activation energy E for this step reaction is 140.92 kJ mol-1, the enthalpy of activation ΔH ≠ is 136.06 kJ mol-1, the Gibbs free energy of activation ΔG ≠ is 145.16 kJ mol-1, the entropy of activation ΔS ≠ is -15.53 J mol-1, and the pre-exponential factor lnA is 29.26. The lifetime equation at mass loss of 10% was deduced as lnτ =-28.72+1.943·104/T by isothermal thermogravimetric analysis.

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Authors and Affiliations

  1. Experimental Center, Hebei Normal University Shijiazhuang, 050016, P. R. China

    J.-J. Zhang & J.-B. Li

  2. College of Chemistry, Hebei Normal University Shijiazhuang, 050091, P. R. China

    R.-F. Wang, S.-P. Wang & N. Ren

  3. College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology Shijiazhuang, 050018, P. R. China

    H.-M. Liu

  4. Department of Computer, Hebei Normal College of Science and Technology Qinhuangdao, 066600, P. R. China

    J.-H. Bai

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  1. J.-J. Zhang
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  3. S.-P. Wang
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  4. H.-M. Liu
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  7. N. Ren
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Zhang, JJ., Wang, RF., Wang, SP. et al. Preparation, thermal decomposition process and kinetics for terbiump-methoxybenzoate ternary complex with 1,10-phenanthroline. J Therm Anal Calorim 79, 181–186 (2005). https://doi.org/10.1007/s10973-004-0582-5

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  • DOI: https://doi.org/10.1007/s10973-004-0582-5

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