Tricine-supported polyoxo(alkoxo)lanthanide cluster {Ln 15 } (Ln = Eu, Gd, Tb) with magnetic refrigerant and fluorescent properties

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-chlori...

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Bibliographic Details
Published in:Polyoxometalates 2023-06, Vol.2 (2), p.9140026-9140026
Main Authors: Sun, Peng-Fei, Zhang, Xiao-Nan, Fan, Cai-Hong, Chen, Wei-Peng, Zheng, Yan-Zhen
Format: Article
Language:English
Subjects:
lanthanide elements
luminescence
magnetic exchange
magnetic refrigeration
polymetallic complexes
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Summary: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.
ISSN:2957-9821
2957-9503
DOI:10.26599/POM.2023.9140026