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Updated: Jun 9, 2026
06:35
Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
Tetradecanuclear {Ni9Ln5} Clusters Featuring Encapsulated {Ln5} Trigonal Bipyramids: Modular 3d-4f Architectures With
Thomais G Tziotzi1, Evangelia G Asmargiannaki1, Ben Thamm1
1Department of Chemistry, The University of Crete, Herakleion, Greece.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|June 8, 2026
Summary
Researchers synthesized novel tetradecanuclear nickel-lanthanide clusters with potential applications in cooling technologies. These magnetic materials exhibit significant magnetocaloric effects, demonstrating their promise for advanced refrigeration and magnetic cooling applications.
Area of Science:
- Coordination Chemistry
- Materials Science
- Magnetism
Background:
- Lanthanide-based coordination complexes are of interest for their unique magnetic properties.
- Developing novel molecular magnetic materials with tunable properties is crucial for advanced applications.
Purpose of the Study:
- To synthesize and characterize novel tetradecanuclear nickel-lanthanide clusters.
- To investigate the magnetic properties and magnetocaloric effect of these new complexes.
Main Methods:
- Solvothermal synthesis of tetradecanuclear nickel-lanthanide complexes.
- Single-crystal X-ray diffraction for structural determination.
- Magnetic susceptibility, magnetothermal, and heat-capacity measurements.
Main Results:
- Successfully synthesized three isostructural tetradecanuclear [Ni9Ln5(OH)9(aib)12(OAc)x(HCOO)y]·12MeCN complexes (Ln = Gd, Y, Dy).
- Structural analysis revealed a trigonal bipyramidal {Ln5} core within a {[NiII3]NiII6} trigonal prism.
- Gd and Dy analogues showed dominant ferromagnetic interactions, while the Y analogue exhibited antiferromagnetic behavior.
- The Gd analogue demonstrated a significant magnetocaloric effect (-ΔSm = 28.1 J kg−1 K−1 at 7 T and 3.9 K) over a broad temperature range.
Conclusions:
- The synthesized nickel-lanthanide clusters are promising candidates for molecular magnetic refrigerants.
- The observed magnetocaloric effect highlights their potential for efficient cooling applications.
- Further studies can explore structural modifications to optimize magnetic and magnetocaloric properties.
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