A Trigonal-Pyramidal Erbium(III) Single-Molecule Magnet
A Trigonal-Pyramidal Erbium(III) Single-Molecule Magnet
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DOI：
10.1002/anie.201411190
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发表时间：
2015-05-11
影响因子：
16.6
通讯作者：
Dunbar, Kim R.
中科院分区：
文献类型：
--
作者：
Brown, Andrew J.;Pinkowicz, Dawid;Dunbar, Kim R.
鉴于最近的单核单分子磁铁（SMMS）的出现，基于具有轴向伸长的F-电子电荷云（Prate）（Prate）的灯笼的理性方法，直到最近才引起了人们的关注。我们在此报告了一个新的SMM，[li（thf）（4）[er {n（n（sime3）（2）}（3）CL]中心点2THF，它在零DC场下表现出磁化强度的缓慢放松，并具有有效的屏障磁化（Delta E-Eff/K（b）= 63.3 K）的逆转和磁性磁滞最高3 k，磁场扫描速率为34.6 OE S（-1）。这项工作质疑必须使用适当的配体框架来稳定扁豆或扁平的灯笼的理论，以使SMM行为受到青睐。
Given the recent advent of mononuclear single-molecule magnets (SMMs), a rational approach based on lanthanides with axially elongated f-electron charge cloud (prolate) has only recently received attention. We report herein a new SMM, [Li(THF)(4)[Er{N(SiMe3)(2)}(3)Cl]center dot 2THF, which exhibits slow relaxation of the magnetization under zero dc field with an effective barrier to the reversal of magnetization (Delta E-eff/k(B)=63.3 K) and magnetic hysteresis up to 3 K at a magnetic field sweep rate of 34.6 Oe s(-1). This work questions the theory that oblate or prolate lanthanides must be stabilized with the appropriate ligand framework in order for SMM behavior to be favored.