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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
A Uniquely Structured Heteronuclear Cluster Cage with Anion-Templated Pentagons and Hexagons
Weiming Huang1, Qingsong Yang1, Wanmin Chen1
1Department of Chemistry and Key Laboratory of Rare Earth Chemistry of Guangdong Higher Education Institutes, Southern University of Science and Technology, Shenzhen 518055, China.
Two novel heterometallic clusters, Gd136Ni84 and Tb136Ni84, were synthesized. The Gd136Ni84 cluster exhibits significant magnetic entropy change, showing potential for magnetic cooling applications.
Area of Science:
- Supramolecular Chemistry
- Inorganic Chemistry
- Materials Science
Background:
- Supramolecular chemistry aims to create complex molecules with unique properties.
- Heterometallic clusters offer tunable properties for advanced applications.
Purpose of the Study:
- To synthesize and characterize novel heterometallic clusters using lanthanides (Gd, Tb) and Nickel.
- To investigate the structural features and magnetic properties of these clusters.
Main Methods:
- Co-hydrolysis of Ln3+ (Ln = Gd, Tb) and Ni2+ in the presence of H2L and triethylamine.
- Structural characterization using mass spectrometry and electron microscopy.
- Magnetic property measurements, including isothermal magnetic entropy change.
Main Results:
- Two isostructural heterometallic clusters, Gd136Ni84 and Tb136Ni84, were successfully synthesized.
- The clusters possess a unique truncated tetrahedral structure, distinct from fullerene cages.
- Gd136Ni84 demonstrated a high magnetic entropy change of 43.91 J·kg−1·K−1 at 3.0 K and 7.0 T.
Conclusions:
- The synthesized clusters represent advanced supramolecular architectures.
- The Gd136Ni84 cluster's magnetic properties suggest its potential utility in magnetic refrigeration.
- The structural integrity of the Gd136Ni84 cluster in solution was confirmed.
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