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Published on: June 9, 2023
Magnetocaloric efficiency tuning through solvent-triggered 3D to 2D interconversion in holmium(III)-based dynamic
Nadia El Alouani Dahmouni1, Marta Orts-Arroyo2, Adrián Sanchis-Perucho1
1Instituto de Ciencia Molecular (ICMol), Universitat de València, c/José Beltrán 2, 46980 Paterna (València), Spain. isabel.castro@uv.es.
Holmium(III) oxalate hydrates exhibit significant magnetocaloric property changes during dehydration and rehydration. These structural transformations impact magnetic cooling efficiency, offering potential for new material applications.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Magnetism
Background:
- Holmium(III) oxalate octadecahydrate features a mixed hexagonal/decagonal 3D net topology.
- Dehydration and rehydration processes can alter the structural and magnetic properties of coordination compounds.
Purpose of the Study:
- To investigate the impact of dehydration and rehydration on the magnetocaloric efficiency of holmium(III) oxalate.
- To characterize the structural transformations occurring during these processes.
Main Methods:
- Synthesis and characterization of holmium(III) oxalate octadecahydrate.
- Controlled dehydration and rehydration experiments.
- Magnetic property measurements to determine magnetocaloric efficiency.
Main Results:
- The octadecahydrate transforms into a decahydrate with a hexagonal 2D net topology via an amorphous anhydrous intermediate.
- Significant changes in magnetocaloric efficiency were observed upon these structural transitions.
Conclusions:
- The structural flexibility of holmium(III) oxalate hydrates allows for tuning of their magnetocaloric properties.
- Understanding these dehydration-rehydration pathways is crucial for designing advanced magnetic cooling materials.
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