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Field-induced single-ion magnet based on a quasi-octahedral Co(II) complex with mixed sulfur-oxygen coordination
D V Korchagin1, Ya E Gureev1,2, E A Yureva1
1Institute of Problems of Chemical Physics, Russian Academy of Sciences, 1, Acad. Semenov Av., Chernogolovka, Russian Federation, 142432. korden@icp.ac.ru.
This study synthesizes a novel cobalt complex, [Co(TDA)2], revealing its unique quasi-octahedral structure. The complex exhibits significant magnetic anisotropy and slow magnetization relaxation, key for potential magnetic material applications.
Area of Science:
- Inorganic Chemistry
- Magnetochemistry
- Quantum Chemistry
Background:
- Coordination complexes with transition metals are crucial in developing advanced materials.
- Understanding the relationship between crystal structure and magnetic properties is essential for designing functional magnetic materials.
Purpose of the Study:
- To synthesize and characterize a novel quasi-octahedral cobalt complex, (pipH2)[Co(TDA)2]·2H2O.
- To investigate the structural and magnetic properties of the synthesized complex.
- To explore the potential of this complex in magnetic applications.
Main Methods:
- X-ray diffraction for structural determination.
- SQUID magnetometry and FD-FT THz-EPR spectroscopy for magnetic property analysis.
- Ab initio SA-CASSCF/NEVPT2 quantum chemical calculations for theoretical insights.
Main Results:
- The cobalt(II) ion is coordinated by two tridentate thiodiacetic acid (TDA) ligands in a distorted octahedral geometry.
- A strong "easy-plane" magnetic anisotropy (D ≈ +54 cm-1) was determined.
- Field-induced slow relaxation of magnetization was observed at 1000 Oe.
Conclusions:
- The synthesized cobalt complex exhibits significant magnetic anisotropy and slow magnetic relaxation.
- The findings contribute to the understanding of structure-property relationships in coordination complexes.
- This complex shows promise for applications in molecular magnetism and data storage.
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