TY - JOUR
T1 - On Approaching the Limit of Molecular Magnetic Anisotropy
T2 - A Near-Perfect Pentagonal Bipyramidal Dysprosium(III) Single-Molecule Magnet
AU - Ding, You Song
AU - Chilton, Nicholas F.
AU - Winpenny, Richard E.P.
AU - Zheng, Yan Zhen
N1 - Publisher Copyright:
© 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2016/12/23
Y1 - 2016/12/23
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].
KW - dysprosium
KW - magnetic anisotropy
KW - magnetic relaxation
KW - single-molecule magnets
UR - https://www.scopus.com/pages/publications/85005999199
U2 - 10.1002/anie.201609685
DO - 10.1002/anie.201609685
M3 - 文章
AN - SCOPUS:85005999199
SN - 1433-7851
VL - 55
SP - 16071
EP - 16074
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 52
ER -