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Magnetic Sponge Behavior via Electronic State Modulations
Jun Zhang1,2, Wataru Kosaka1, Kunihisa Sugimoto3
1Institute for Materials Research , Tohoku University , 2-1-1 Katahira , Aoba-ku, Sendai 980-8577 , Japan.
Journal of the American Chemical Society
|April 5, 2018
Summary
This study demonstrates a switchable molecular magnet using a magnetic sponge material. Solvation/desolvation cycles reversibly modulate the electronic and structural states, altering magnetic ordering temperature by ~70 K.
Area of Science:
- Molecular Magnetism
- Materials Science
- Supramolecular Chemistry
Background:
- Reversible magnetic changes are crucial for molecular magnetic materials.
- Stimuli-induced spin changes can significantly alter magnetic properties.
Purpose of the Study:
- To demonstrate a reversible magnetic change linked to electronic and structural modifications.
- To investigate solvation/desolvation effects on a D2A-type layered magnet.
Main Methods:
- Synthesis of a D2A-type layered magnet: [{Ru2(O2CPh-2,3,5-Cl3)4}2(TCNQMe2)]·4DCM.
- Characterization of electronic and structural states via solvation/desolvation cycles.
- Magnetic property measurements, including Curie temperature (Tc) determination.
Main Results:
- The initial compound exhibited ferrimagnetic ordering at Tc = 101 K due to a one-electron-transferred, charge-ordered state.
- Solvent removal (desolvation) yielded a solvent-free compound with a charge-disproportionate disordered state.
- The desolvated compound showed reduced ferrimagnetic ordering at Tc = 34 K.
Conclusions:
- A reversible magnetic change (ΔTc ≈ 70 K) was achieved through solvation/desolvation-induced electronic and structural modulation.
- This work highlights the potential of magnetic sponges for tunable molecular magnetism.
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