Please use this identifier to cite or link to this item: https://doi.org/10.1021/jacs.5b13584
Title: Symmetry-Supported Magnetic Blocking at 20 K in Pentagonal Bipyramidal Dy(III) Single-Ion Magnets
Authors: Chen, Yan-Cong
Liu, Jun-Liang
Ungur, Liviu 
Liu, Jiang
Li, Quan-Wen
Wang, Long-Fei
Ni, Zhao-Ping
Chibotaru, Liviu F
Chen, Xiao-Ming
Tong, Ming-Liang
Keywords: Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Chemistry
MOLECULE-MAGNET
RELAXATION
ANISOTROPY
COMPLEXES
DY
RATIONALIZATION
TEMPERATURE
EXCHANGE
FIELD
Issue Date: 2-Mar-2016
Publisher: AMER CHEMICAL SOC
Citation: Chen, Yan-Cong, Liu, Jun-Liang, Ungur, Liviu, Liu, Jiang, Li, Quan-Wen, Wang, Long-Fei, Ni, Zhao-Ping, Chibotaru, Liviu F, Chen, Xiao-Ming, Tong, Ming-Liang (2016-03-02). Symmetry-Supported Magnetic Blocking at 20 K in Pentagonal Bipyramidal Dy(III) Single-Ion Magnets. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 138 (8) : 2829-2837. ScholarBank@NUS Repository. https://doi.org/10.1021/jacs.5b13584
Abstract: Single-molecule magnets (SMMs) that can be trapped in one of the bistable magnetic states separated by an energy barrier are among the most promising candidates for high-density information storage, quantum processing, and spintronics. To date, a considerable series of achievements have been made. However, the presence of fast quantum tunnelling of magnetization (QTM) in most SMMs, especially in single-ion magnets (SIMs), provides a rapid relaxation route and often sets up a limit for the relaxation time. Here, we pursue the pentagonal bipyramidal symmetry to suppress the QTM and present pentagonal bipyramidal Dy(III) SIMs [Dy(Cy3PO)2(H2O)5]Cl3·(Cy3PO)·H2O·EtOH (1) and [Dy(Cy3PO)2(H2O)5]Br3·2(Cy3PO)·2H2O·2EtOH (2), (Cy3PO = tricyclohexyl phosphine oxide). Magnetic characterizations reveal their fascinating SMM properties with high energy barriers as 472(7) K for 1 and 543(2) K for 2, along with a record magnetic hysteresis temperature up to 20 K for 2. These results, combined with the ab initio calculations, offer an illuminating insight into the vast possibility and potential of what the symmetry rules can achieve in molecular magnetism.
Source Title: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
URI: https://scholarbank.nus.edu.sg/handle/10635/228728
ISSN: 0002-7863
1520-5126
DOI: 10.1021/jacs.5b13584
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