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Polyoxometalates 2023, 2(2): 9140026 https://doi.org/10.26599/POM.2023.9140026
Research Article | Open Access | Issue | Published: 12 March 2023

Tricine-supported polyoxo(alkoxo)lanthanide cluster {Ln15} (Ln = Eu, Gd, Tb) with magnetic refrigerant and fluorescent properties

Show Author's Information Peng-Fei Sun,  Xiao-Nan Zhang,  Cai-Hong Fan,  Wei-Peng Chen ( ),  Yan-Zhen Zheng ( )
Frontier Institute of Science and Technology, State Key Laboratory of Mechanical Behavior for Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi’an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry, Xi’an Jiaotong University, Xi’an 710054, China
Keywords:
luminescence, polymetallic complexes, lanthanide elements, magnetic refrigeration, magnetic exchange
Cite this article:
Sun P-F, Zhang X-N, Fan C-H, et al. Tricine-supported polyoxo(alkoxo)lanthanide cluster {Ln15} (Ln = Eu, Gd, Tb) with magnetic refrigerant and fluorescent properties. Polyoxometalates, 2023, 2(2): 9140026. https://doi.org/10.26599/POM.2023.9140026
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Abstract Full text Electronic supplementary material About this article

A family of polyoxo(alkoxo)lanthanide cluster {Ln15} (Ln = Eu (1), Gd (2), Tb (3)) was successfully isolated via a simple hydrolysis reaction of lanthanide metal ions in the presence of tricine ligands. X-ray diffraction analyses revealed that {Ln15} displayed a wheel-like structure with a µ5-chloride anion as a template. Interestingly, each analog showed distinctive functions based on the different Ln(III) ions. Complexes 1 and 3 in the solid state emitted the characteristic fluorescence of Eu(III) or Tb(III). The fluorescence lifetimes of the 5D0 excited state for 1 and the 5D4 excited state for 3 were tested, and the values were 890 and 250 μs, respectively. Meanwhile, gadolinium analog 2 exhibited a magneto-caloric effect at ultralow temperatures with a maximum −ΔSm value of 29.9 J·kg−1·K−1 at 3 K and 7 T.


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About this article

Tricine-supported polyoxo(alkoxo)lanthanide cluster {Ln15} (Ln = Eu, Gd, Tb) with magnetic refrigerant and fluorescent properties

Show Author's information Peng-Fei Sun, Xiao-Nan Zhang, Cai-Hong Fan, Wei-Peng Chen ( ), Yan-Zhen Zheng ( )
Frontier Institute of Science and Technology, State Key Laboratory of Mechanical Behavior for Materials, MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter, Xi’an Key Laboratory of Sustainable Energy and Materials Chemistry, School of Chemistry, Xi’an Jiaotong University, Xi’an 710054, China

Abstract

A family of polyoxo(alkoxo)lanthanide cluster {Ln15} (Ln = Eu (1), Gd (2), Tb (3)) was successfully isolated via a simple hydrolysis reaction of lanthanide metal ions in the presence of tricine ligands. X-ray diffraction analyses revealed that {Ln15} displayed a wheel-like structure with a µ5-chloride anion as a template. Interestingly, each analog showed distinctive functions based on the different Ln(III) ions. Complexes 1 and 3 in the solid state emitted the characteristic fluorescence of Eu(III) or Tb(III). The fluorescence lifetimes of the 5D0 excited state for 1 and the 5D4 excited state for 3 were tested, and the values were 890 and 250 μs, respectively. Meanwhile, gadolinium analog 2 exhibited a magneto-caloric effect at ultralow temperatures with a maximum −ΔSm value of 29.9 J·kg−1·K−1 at 3 K and 7 T.

Keywords: luminescence, polymetallic complexes, lanthanide elements, magnetic refrigeration, magnetic exchange

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Publication history

Received: 26 November 2022
Revised: 01 January 2023
Accepted: 13 February 2023
Published: 12 March 2023
Issue date: June 2023

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© The Author(s) 2023. Polyoxometalates published by Tsinghua University Press.

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 21971203), Special Support Plan of Shaanxi Province for Young Top-notch Talent, the Instrument Analysis Center of Xi’an Jiaotong University for assistance, and Fundamental Research Funds for Central Universities.

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