Dy_cation.pdf (1.22 MB)
A dysprosium metallocene single-molecule magnet functioning at the axial limit
journal contribution
posted on 2023-06-09, 14:40 authored by Fu-Sheng Guo, Benjamin M Day, Yan-Cong Chen, Ming-Liang Tong, Akseli Mansikkamäki, Richard LayfieldRichard LayfieldAbstraction of a chloride ligand from the dysprosium metallocene [(Cpttt)2DyCl] (1Dy Cpttt=1,2,4-tri(tert-butyl)cyclopentadienide) by the triethylsilylium cation produces the first base-free rare-earth metallocenium cation [(Cpttt)2Dy]+ (2Dy) as a salt of the non-coordinating [B(C6F5)4]- anion. Magnetic measurements reveal that [2Dy][B(C6F5)4] is an SMM with a record anisotropy barrier up to 1277 cm-1 (1837 K) in zero field and a record magnetic blocking temperature of 60 K, including hysteresis with coercivity. The exceptional magnetic axiality of 2Dy is further highlighted by computational studies, which reveal this system to be the first lanthanide SMM in which all low-lying Kramers doublets correspond to a well-defined MJ value, with no significant mixing even in the higher doublets.
History
Publication status
- Published
File Version
- Accepted version
Journal
Angewandte Chemie International EditionISSN
1433-7851Publisher
WileyExternal DOI
Issue
38Volume
56Page range
11445-11449Department affiliated with
- Chemistry Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2018-08-22First Open Access (FOA) Date
2018-09-06First Compliant Deposit (FCD) Date
2018-08-20Usage metrics
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