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Issue 6, 2019
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A new air- and moisture-stable pentagonal-bipyramidal DyIII single-ion magnet based on the HMPA ligand

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Abstract

Based on the HMPA ligand, a new air- and moisture-stable pentagonal-bipyramidal DyIII single-ion magnet [Dy(HMPA)2(H2O)5]2·Br6·2HMPA·2H2O (1) was prepared and characterized. Single-crystal X-ray tests showed the two crystallographically independent DyIII ions located in a pentagonal-bipyramidal coordination sphere with strong axial HMPA ligands and weak equatorial water molecules relating to strong unaxial anisotropy. Direct-current and alternating-current magnetic susceptibilities were measured and showed that 1 exhibited slow relaxation of magnetization up to 36 K (1000 Hz) with an energy barrier of 556 K and blocking temperature of 7 K (defined by the peak temperature of zero-field cooling data). The application of a dc field and magnetic dilution were also carried out to explore the existing quantum tunelling of the magnetization process.

Graphical abstract: A new air- and moisture-stable pentagonal-bipyramidal DyIII single-ion magnet based on the HMPA ligand

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Publication details

The article was received on 02 Sep 2018, accepted on 08 Jan 2019 and first published on 08 Jan 2019


Article type: Paper
DOI: 10.1039/C8DT03565B
Citation: Dalton Trans., 2019,48, 2213-2219

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    A new air- and moisture-stable pentagonal-bipyramidal DyIII single-ion magnet based on the HMPA ligand

    L. Li, H. Su, S. Liu, Y. Xu and W. Wang, Dalton Trans., 2019, 48, 2213
    DOI: 10.1039/C8DT03565B

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