Phys.org April 14, 2023
Researchers in China isolated a family of polyoxo(alkoxo)lanthanide cluster {Ln15} (Ln = Eu (1), Gd (2), Tb (3)) 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. 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… read more. Open Access TECHNICAL ARTICLE
… synthesized a family of nano-wheel-like metallic clusters, each with specific properties … Credit: Polyoxometalates, Tsinghua University Press