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Issue 5, 2019
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Slow magnetic relaxation in a {EuCu5} metallacrown

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A 3d–4f heterometallic metallacrown with formula of [EuCu5(quinha)5(sal)2(py)5]CF3SO3·py·3H2O (1) (H2quinha = quinaldichydroxamic acid; Hsal = salicylaldehyde) has been synthesized. This complex shows field-induced slow magnetic relaxation via a Raman-like process, where studies of the isostructural {LuCu5} (2) and {YCu5} (3) complexes show that the slow dynamics mainly arise from the {Cu5} S = 1/2 ground state rather than the EuIII ion. However, the EuIII ion enhances the relaxation rates of the {Cu5} unit which likely arises from second-order effects in the formally diamagnetic 7F0 ground state of EuIII.

Graphical abstract: Slow magnetic relaxation in a {EuCu5} metallacrown

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Article information

06 Dec 2018
21 Dec 2018
First published
26 Dec 2018

Dalton Trans., 2019,48, 1686-1692
Article type

Slow magnetic relaxation in a {EuCu5} metallacrown

J. Wang, Z. Ruan, Q. Li, Y. Chen, G. Huang, J. Liu, D. Reta, N. F. Chilton, Z. Wang and M. Tong, Dalton Trans., 2019, 48, 1686
DOI: 10.1039/C8DT04814B

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