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Saddle-Shaped Heterometallic 3d-4f Cluster: Structure and Magnetocaloric Effect
Qingxin Liu1, Min Feng1, 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.
A novel gadolinium-cobalt cluster exhibits a unique saddle shape and a central cavity. This heterometallic complex shows promise for magnetic cooling applications due to its significant magnetic entropy change.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Magnetochemistry
Background:
- Heterometallic 3d-4f cluster complexes are of significant interest.
- These complexes offer unique structural aesthetics, properties, and applications.
Purpose of the Study:
- To synthesize and characterize a novel heterometallic gadolinium-cobalt cluster.
- To investigate its structural features and magnetic properties for potential applications.
Main Methods:
- Co-hydrolysis of Gd³⁺ and Co²⁺ in the presence of iminodiacetate (IDA).
- Crystallographic studies to determine the cluster's structure.
- Magnetic measurements to assess magnetic entropy change.
Main Results:
- A saddle-shaped cyclic cluster [Gd₆₈Co₆₀(OH)₁₁₆(CH₃COO)₈(IDA)₅₆(CO₃)₄(C₂O₄)₈(H₂O)₉₂Cl₁₆]Cl₄₈·10H₂O·60CH₃OH was synthesized.
- The structure features a nanometer-sized central cavity.
- A maximum magnetic entropy change of 38.58 J·K⁻¹·kg⁻¹ was achieved at 3.0 K and 7.0 T.
Conclusions:
- The synthesized Gd-Co cluster possesses unique structural characteristics.
- Its notable magnetic entropy change positions it as a promising candidate for magnetic cooling applications.
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