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Issue 2, 2017
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Hydroxide-bridged five-coordinate DyIII single-molecule magnet exhibiting the record thermal relaxation barrier of magnetization among lanthanide-only dimers

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Abstract

A hydroxide-bridged centrosymmetric DyIII dimer with each DyIII being five-coordinated has been synthesized using bulky hindered phenolate ligands. Magnetic studies revealed that this compound exhibits a slow magnetic relaxation of a single-ion origin together with a step-like magnetic hysteresis of the magnetic coupled cluster. The thermal relaxation barrier of magnetization is 721 K in the absence of a static magnetic field, while the intramolecular magnetic interaction is very large among reported 4f-only dimers. CASSCF calculations with a larger active space were performed to understand the electronic structure of the compound. The thermal relaxation regime and the quantum tunneling regime are well separated, representing a good model to study the relaxation mechanism of SMMs with intramolecular Dy–Dy magnetic interactions.

Graphical abstract: Hydroxide-bridged five-coordinate DyIII single-molecule magnet exhibiting the record thermal relaxation barrier of magnetization among lanthanide-only dimers

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Publication details

The article was received on 13 Aug 2016, accepted on 01 Oct 2016 and first published on 03 Oct 2016


Article type: Edge Article
DOI: 10.1039/C6SC03621J
Citation: Chem. Sci., 2017,8, 1288-1294
  • Open access: Creative Commons BY-NC license
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    Hydroxide-bridged five-coordinate DyIII single-molecule magnet exhibiting the record thermal relaxation barrier of magnetization among lanthanide-only dimers

    J. Xiong, H. Ding, Y. Meng, C. Gao, X. Zhang, Z. Meng, Y. Zhang, W. Shi, B. Wang and S. Gao, Chem. Sci., 2017, 8, 1288
    DOI: 10.1039/C6SC03621J

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