On Approaching The Limit of Molecular Magnetic Anisotropy: A Near-Perfect Pentagonal Bipyramidal DyIII Single-Molecule Magnet

You Song Ding; Nicholas Chilton; Richard Winpenny; Yan-Zhen Zheng

doi:10.1002/anie.201609685

On Approaching The Limit of Molecular Magnetic Anisotropy: A Near-Perfect Pentagonal Bipyramidal DyIII Single-Molecule Magnet

You Song Ding, Nicholas Chilton, Richard Winpenny, Yan-Zhen Zheng

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Abstract

We report a monometallic dysprosium complex, [Dy(OtBu)2(py)5][BPh4] (5), that shows the largest effective energy barrier to magnetic relaxation of Ueff=1815(1) K. The massive magnetic anisotropy is due to bis-trans-disposed tert-butoxide ligands with weak equatorial pyridine donors, approaching proposed schemes for high-temperature single-molecule magnets (SMMs). The blocking temperature, TB , is 14 K, defined by zero-field-cooled magnetization experiments, and is the largest for any monometallic complex and equal with the current record for [Tb2N2{N(SiMe3)2}4(THF)2].

Original language	English
Pages (from-to)	16071-16074
Number of pages	4
Journal	Angewandte Chemie - International Edition
Volume	55
Issue number	52
Early online date	22 Nov 2016
DOIs	https://doi.org/10.1002/anie.201609685
Publication status	Published - 21 Dec 2016

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1800K_MS_revised_FINALAccepted author manuscript, 858 KB

CCDC 1507883: Experimental Crystal Structure Determination
Ding, Y. S. (Contributor), Chilton, N. (Contributor), Winpenny, R. (Contributor) & Zheng, Y.-Z. (Contributor), Cambridge Crystallographic Data Centre, 1 Jan 2017
DOI: 10.5517/ccdc.csd.cc1mm2dq, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/ccdc.csd.cc1mm2dq&sid=DataCite
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title = "On Approaching The Limit of Molecular Magnetic Anisotropy: A Near-Perfect Pentagonal Bipyramidal DyIII Single-Molecule Magnet",

abstract = "We report a monometallic dysprosium complex, [Dy(OtBu)2(py)5][BPh4] (5), that shows the largest effective energy barrier to magnetic relaxation of Ueff=1815(1) K. The massive magnetic anisotropy is due to bis-trans-disposed tert-butoxide ligands with weak equatorial pyridine donors, approaching proposed schemes for high-temperature single-molecule magnets (SMMs). The blocking temperature, TB , is 14 K, defined by zero-field-cooled magnetization experiments, and is the largest for any monometallic complex and equal with the current record for [Tb2N2{N(SiMe3)2}4(THF)2].",

author = "Ding, {You Song} and Nicholas Chilton and Richard Winpenny and Yan-Zhen Zheng",

year = "2016",

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doi = "10.1002/anie.201609685",

language = "English",

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T1 - On Approaching The Limit of Molecular Magnetic Anisotropy: A Near-Perfect Pentagonal Bipyramidal DyIII Single-Molecule Magnet

AU - Ding, You Song

AU - Chilton, Nicholas

AU - Winpenny, Richard

AU - Zheng, Yan-Zhen

PY - 2016/12/21

Y1 - 2016/12/21

N2 - We report a monometallic dysprosium complex, [Dy(OtBu)2(py)5][BPh4] (5), that shows the largest effective energy barrier to magnetic relaxation of Ueff=1815(1) K. The massive magnetic anisotropy is due to bis-trans-disposed tert-butoxide ligands with weak equatorial pyridine donors, approaching proposed schemes for high-temperature single-molecule magnets (SMMs). The blocking temperature, TB , is 14 K, defined by zero-field-cooled magnetization experiments, and is the largest for any monometallic complex and equal with the current record for [Tb2N2{N(SiMe3)2}4(THF)2].

AB - We report a monometallic dysprosium complex, [Dy(OtBu)2(py)5][BPh4] (5), that shows the largest effective energy barrier to magnetic relaxation of Ueff=1815(1) K. The massive magnetic anisotropy is due to bis-trans-disposed tert-butoxide ligands with weak equatorial pyridine donors, approaching proposed schemes for high-temperature single-molecule magnets (SMMs). The blocking temperature, TB , is 14 K, defined by zero-field-cooled magnetization experiments, and is the largest for any monometallic complex and equal with the current record for [Tb2N2{N(SiMe3)2}4(THF)2].

U2 - 10.1002/anie.201609685

DO - 10.1002/anie.201609685

M3 - Article

SN - 1433-7851

VL - 55

SP - 16071

EP - 16074

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 52

ER -

On Approaching The Limit of Molecular Magnetic Anisotropy: A Near-Perfect Pentagonal Bipyramidal DyIII Single-Molecule Magnet

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CCDC 1507883: Experimental Crystal Structure Determination

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