Probing the Axial Distortion Effect on the Magnetic Anisotropy of Octahedral Co(II) Complexes
- 11 May 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 59 (11), 7622-7630
- https://doi.org/10.1021/acs.inorgchem.0c00531
Abstract
Three mononuclear octahedral Co(II) complexes are reported, [Co(py)4(SCN)2] (1), [Co(py)4(Cl)2]·H2O (2), and [Co(py)4(Br)2] (3), that exhibit different distortions with compression (1) or elongation (2 and 3) of the axial positions. Easy plane magnetic anisotropy was confirmed by magnetic, HF-EPR, and computational studies for all complexes. Further analyses indicate that both the sign and magnitude of zero-field splitting parameters experience a significant change (D ≥ ±150 cm–1) by tuning of the axial and equatorial ligand field strength. Slow magnetic relaxation is observed for all compounds which is dominated by the Raman process involving both acoustic and optical phonons.Keywords
Funding Information
- Division of Chemistry (CHE-1808779)
- Welch Foundation (A-1449)
- Southern University of Science and Technology
- National Natural Science Foundation of China (21671095, 21901108)
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