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Synthesis, characterization, and calorimetric investigation of ternary lanthanide complexes with benzoic acid and 2-phenylimidazo[4,5-f]1,10-phenanthroline

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Abstract

A series of solid ternary lanthanide complexes with the general formula Ln(BA)3(PIP) (Ln = La–Lu, except Pm) were prepared with hydrated lanthanide chloride, benzoic acid (BA), and 2-phenylimidazo[4,5-f]1,10-phenanthroline (PIP). These obtained complexes were characterized by means of elemental analysis, EDTA volumetric analysis, IR spectroscopy, X-ray powder diffraction, and mass spectroscopy. The thermal decomposition mechanism of all complexes in the solid state was explored using TG–DTG techniques under dynamic flow of air atmosphere. Moreover, the constant-volume combustion energies, ∆c U, of the complexes were determined by a precise rotating-bomb calorimeter (RBC-type II) at 298.15 K. Their standard molar enthalpies of combustion, \( \Delta _{\text{c}} H_{\text{m}}^{\uptheta} \), and standard molar enthalpies of formation, \( \Delta_{\text{f}} H_{\text{m}}^{\uptheta} \), were calculated.

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Acknowledgements

This project was supported by the National Natural Science Foundation of China (No. 21127004) and “13115” S&T Innovation Program of Shaanxi province (No. 2008ZDKG-22).

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Authors and Affiliations

  1. Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi’an, 710069, People’s Republic of China

    Wu-Juan Sun, Fei Liu & Xu-Wu Yang

  2. Department of Biochemical Engineering, Xianyang Vocational Technical College, Xianyang, 712000, Shaanxi, People’s Republic of China

    Wen-Jie Zhao

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  1. Wu-Juan Sun
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Correspondence to Xu-Wu Yang.

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Sun, WJ., Liu, F., Zhao, WJ. et al. Synthesis, characterization, and calorimetric investigation of ternary lanthanide complexes with benzoic acid and 2-phenylimidazo[4,5-f]1,10-phenanthroline. J Therm Anal Calorim 119, 671–680 (2015). https://doi.org/10.1007/s10973-014-4087-6

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