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Synthesis and thermal decomposition kinetics of two lanthanide complexes with cinnamic acid and 2,2′-Bipyridine

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Abstract

The two complexes of [Ln(CA)3bipy]2 (Ln = Tb and Dy; CA = cinnamate; bipy = 2,2′-bipyridine) were prepared and characterized by elemental analysis, infrared spectra, ultraviolet spectra, thermogravimetry and differential thermogravimetry techniques. The thermal decomposition behaviors of the two complexes under a static air atmosphere can be discussed by thermogravimetry and differential thermogravimetry and infrared spectra techniques. The non-isothermal kinetics was investigated by using a double equal-double steps method, the nonlinear integral isoconversional method and the Starink method. The mechanism functions of the first decomposition step of the two complexes were determined. The thermodynamic parameters (ΔH , ΔG and ΔS ) and kinetic parameters (activation energy E and the pre-exponential factor A) of the two complexes were also calculated.

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Acknowledgements

This project was supported by the National Natural Science Foundation of China (No. 20773034), the Natural Science Foundation of Hebei Province (No. B2007000237, No. E2009000307) and Education Department Scientific Research Fund from Hebei Province (2008469).

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Correspondence to J. J. Zhang.

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Tian, L., Ren, N., Zhang, J.J. et al. Synthesis and thermal decomposition kinetics of two lanthanide complexes with cinnamic acid and 2,2′-Bipyridine. J Therm Anal Calorim 99, 349–356 (2010). https://doi.org/10.1007/s10973-009-0272-4

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  • DOI: https://doi.org/10.1007/s10973-009-0272-4

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