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Issue 9, 2015
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Single-molecule magnet involving strong exchange coupling in terbium(iii) complex with 2,2′-bipyridin-6-yl tert-butyl nitroxide

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Abstract

A novel terbium(III)-radical complex [TbIII(hfac)3(6bpyNO)] (Tb-6bpyNO; 6bpyNO = 2,2′-bipyridin-6-yl tert-butyl nitroxide) was synthesized. The intramolecular antiferromagnetic interaction in Tb-6bpyNO was confirmed by comparison with the magnetic properties of [TbIII(hfac)3(6bpyCO)] (Tb-6bpyCO; 6bpyCO = 2,2′-bipyridin-6-yl tert-butyl ketone) together with [YIII(hfac)3(6bpyNO)]. Tb-6bpyNO showed a hysteresis loop with negligible coersivity below 1.6 K. The dispersion of the magnetic susceptibility with an applied bias field of 2000 Oe gave the energy barrier Ea/kB = 21.1(8) K. In contrast, Tb-6bpyCO did not behave as a single-molecule magnet, despite having practically the same crystal field.

Graphical abstract: Single-molecule magnet involving strong exchange coupling in terbium(iii) complex with 2,2′-bipyridin-6-yl tert-butyl nitroxide

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Supplementary files

Article information


Submitted
08 Jun 2015
Accepted
07 Jul 2015
First published
07 Jul 2015

Inorg. Chem. Front., 2015,2, 860-866
Article type
Research Article
Author version available

Single-molecule magnet involving strong exchange coupling in terbium(III) complex with 2,2′-bipyridin-6-yl tert-butyl nitroxide

T. Kanetomo, S. Yoshii, H. Nojiri and T. Ishida, Inorg. Chem. Front., 2015, 2, 860
DOI: 10.1039/C5QI00098J

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