A dysprosium metallocene single-molecule magnet functioning at the axial limit

Guo, Fu-Sheng, Day, Benjamin M, Chen, Yan-Cong, Tong, Ming-Liang, Mansikkamäki, Akseli and Layfield, Richard (2017) A dysprosium metallocene single-molecule magnet functioning at the axial limit. Angewandte Chemie International Edition, 56 (38). pp. 11445-11449. ISSN 1433-7851

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Abstraction 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.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Depositing User: Richard Layfield
Date Deposited: 22 Aug 2018 16:33
Last Modified: 02 Jul 2019 14:32
URI: http://sro.sussex.ac.uk/id/eprint/78160

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