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A neodymium(III) complex with 3, 4, 5 - triethoxybenzoic acid and 1,10-phenanthroline

Structure, low-temperature heat capacity, and thermodynamic functions

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Abstract

The novel complex [Nd(3,4,5-TEOBA)3phen]2(3,4,5-TEOBA = 3,4,5-triethoxybenzoate; phen = 1,10-phenanthroline) has been synthesized and characterized by elemental analysis, IR spectra, single-crystal X-ray diffraction, and thermogravimetry/differential scanning calorimetry-Fourier transform infrared (TG/DSC-FTIR) technology. Single-crystal X-ray diffraction data show the complex has two center metals, and each center is coordinated by seven oxygen atoms and two nitrogen atoms to form a distorted monocapped square antiprism geometry. The binuclear molecular skeleton connects together to form a 1D chain via stacking π–π interactions. The thermal decomposition mechanism of the title complex has been studied by TG/DSC-FTIR technology. The low-temperature heat capacity of the complex has been measured using a physical property measurement system in the temperature range from 1.9 to 300 K. The heat capacity was fitted to a series of theoretical and empirical models, and the thermodynamic functions were calculated based on the curve fitting.

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Acknowledgements

The research work was supported by the National Natura Science Foundation of China (No. 21473049) and the Natural Science Foundation of Hebei Province (No. B2016205207). Science and technology program of Handan (No. 1621202043-2).

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Authors and Affiliations

  1. College of Chemical Engineering & Material, Handan University, Handan, Hebei, 056005, People’s Republic of China

    Xiao-Xia Qi & Ning Ren

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

    Xiao-Xia Qi & 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, Liaoning, 116023, People’s Republic of China

    Quan Shi

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  1. Xiao-Xia Qi
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  2. Quan Shi
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  4. Jian-Jun Zhang
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Correspondence to Ning Ren or Jian-Jun Zhang.

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Qi, XX., Shi, Q., Ren, N. et al. A neodymium(III) complex with 3, 4, 5 - triethoxybenzoic acid and 1,10-phenanthroline . J Therm Anal Calorim 135, 2583–2590 (2019). https://doi.org/10.1007/s10973-018-7269-9

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  • DOI: https://doi.org/10.1007/s10973-018-7269-9

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