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Rare earth compounds with 3-methoxybenzoic acid and terpyridine ligands

Structures, thermal and spectroscopic properties

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Abstract

Two trivalent rare earth compounds [Ln(3-MOBA)3(terpy)(H2O)]2 (Ln = Tb (1), Eu (2); 3-MOBA = 3-methoxybenzoate, terpy = 2,2′:6′,2″-terpyridine) were obtained in solid state, and the structure of 1 was determined by X-ray diffraction. The analysis of characterization was performed by elemental analysis, IR spectra, X-ray powder diffraction, thermogravimetric and differential scanning calorimetry coupled to infrared spectrometer (TG/DSC–FTIR). Besides that the luminescent properties and antibacterial activities were discussed. The crystal structure of 1 revealed that the asymmetric units were further stitched together to form 1D chain along the x-axis direction through the offset face-to-face π···π weak stacking interactions. Luminescence investigation revealed that compounds exhibited strong green and red emissions and the fluorescence quantum yield of two compounds were measured. What’s more, the Commission Internationale de L’Eclairage chromaticity diagrams were presented. The antibacterial activity studies show that two compounds had good antibacterial actions on E. coli, S. aureus and no antibacterial activities on C. albicans.

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Acknowledgements

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

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Authors and Affiliations

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

    Pan-Pan Shen, Ning Ren & Xin-Fang Zheng

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

    Pan-Pan Shen & Jian-Jun Zhang

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  1. Pan-Pan Shen
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  2. Ning Ren
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  3. Jian-Jun Zhang
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  4. Xin-Fang Zheng
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Correspondence to Ning Ren or Jian-Jun Zhang.

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Shen, PP., Ren, N., Zhang, JJ. et al. Rare earth compounds with 3-methoxybenzoic acid and terpyridine ligands. J Therm Anal Calorim 135, 2687–2695 (2019). https://doi.org/10.1007/s10973-018-7265-0

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  • DOI: https://doi.org/10.1007/s10973-018-7265-0

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