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Issue 28, 2019
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Switching on single-molecule magnet properties of homoleptic sandwich tris(pyrazolyl)borate dysprosium(iii) cations via intermolecular dipolar coupling

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Abstract

Two new homoleptic DyIII compounds [Dy(TpMe2)2][DyCl3(TpMe2)]·CH2Cl2 (1) and [Dy(TpMe2)2]I (3) as well as a heteroleptic (NMe4)[DyCl3(TpMe2)] (2) (TpMe2 = tris(3,5-dimethylpyrazolyl)borate) species are reported. Magnetic studies revealed that 1 is a single-molecule magnet (SMM) with an energy barrier of Ueff = 80.7 K with τ0 = 6.2 × 10−7 s under a zero applied field. Compound 3 exhibits a Ueff of 13.5 K with τ0 = 1.6 × 10−6 s under a 0.08 T applied field. Ab initio CASSCF + RASSI-SO calculations were performed to further investigate the magnetic behavior of complexes 1–3. The results support experimental magnetic data for 1 and 3 and indicate that an intermolecular dipolar interaction of (zJ = −0.1 cm−1) is responsible for the SMM behavior of 1.

Graphical abstract: Switching on single-molecule magnet properties of homoleptic sandwich tris(pyrazolyl)borate dysprosium(iii) cations via intermolecular dipolar coupling

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Article information


Submitted
08 Feb 2019
Accepted
09 May 2019
First published
21 May 2019

Dalton Trans., 2019,48, 10610-10618
Article type
Paper

Switching on single-molecule magnet properties of homoleptic sandwich tris(pyrazolyl)borate dysprosium(III) cations via intermolecular dipolar coupling

D. I. Alexandropoulos, K. R. Vignesh, H. Xie and K. R. Dunbar, Dalton Trans., 2019, 48, 10610
DOI: 10.1039/C9DT00597H

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