A Trigonal-Pyramidal Erbium(III) Single-Molecule Magnet

被引：145

作者：

Brown, Andrew J. ^{[1
]}

Pinkowicz, Dawid ^{[2
]}

Saber, Mohamed R. ^{[1
]}

Dunbar, Kim R. ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA

[2] Jagiellonian Univ, Fac Chem, PL-30060 Krakow, Poland

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2015年 / 54卷 / 20期

关键词：

erbium; magnetic hysteresis; mononuclear; prolate lanthanides; single-molecule magnets; LANTHANIDE AMIDES; CATALYTIC-ACTIVITY; ION MAGNETS; COMPLEXES; RELAXATION; ANISOTROPY; STRATEGIES; SYMMETRY; BLOCKING; LIGANDS;

D O I：

10.1002/anie.201411190

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：5864 / 5868

页数：5

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