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Synthesis, crystal structures, and thermodynamic properties of two new lanthanide complexes

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Abstract

Two new complexes [Tb(2,3-DClBA)3(5,5′-dmebipy)(H2O)]2 and [Er(2,3-DClBA)3(5,5′-dmebipy)(H2O)]2 (2,3-DClBA = 2,3-dichlorobenzoate; 5,5′-dmebipy = 5,5′-dimethylbipyridine) were prepared and characterized by single crystal X-ray diffraction, elemental analysis, IR spectra, and TG/DSC technology. Single crystal X-ray diffraction data show that the two complexes are isomorphous. The complex is a binuclear molecular. Each Ln3+ center is coordinated by six oxygen atoms and two nitrogen atoms to form a distorted square antiprism geometry. The supramolecular architecture of the complex is constructed by H bond and halogen–halogen interactions. The thermal decomposition mechanism of the two complexes has been studied by TG/DSC technology. The low-temperature heat capacities of the complexes have been measured using a physical property measurement system in the temperature range from 10 to 302 K. The heat capacities were fitted to the polynomial equations by a least square method, and the thermodynamic functions were calculated based on the curve fitting.

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Acknowledgements

The research work is supported by the National Natural Science Foundation of China (Nos. 21473049 and 21473198) and the Natural Science Foundation of Hebei Province (No. B2016205207).

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Authors and Affiliations

  1. Testing and Analysis Center, Hebei Normal University, Shijiazhuang, 050024, Hebei, People’s Republic of China

    Jun-Chen Wu & Jian-Jun Zhang

  2. College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, 050024, Hebei, People’s Republic of China

    Jun-Chen Wu, Li-Na Geng & Jian-Jun Zhang

  3. Thermochemistry Laboratory, Liaoning Province Key Laboratory of Thermochemistry for Energy and Materials, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, Liaoning, People’s Republic of China

    Quan Shi

  4. College of Chemical Engineering and Material, Handan College, Handan, 056005, Hebei, People’s Republic of China

    Ning Ren

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  1. Jun-Chen Wu
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  2. Quan Shi
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Correspondence to Ning Ren or Jian-Jun Zhang.

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Wu, JC., Shi, Q., Geng, LN. et al. Synthesis, crystal structures, and thermodynamic properties of two new lanthanide complexes. J Therm Anal Calorim 131, 2993–3001 (2018). https://doi.org/10.1007/s10973-017-6672-y

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  • DOI: https://doi.org/10.1007/s10973-017-6672-y

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