Hexanuclear [Cp*Dy]6 single-molecule magnet

被引：15
|
作者：
Wu, Jianfeng [1 ,2 ]
Demeshko, Serhiy [1 ]
Dechert, Sebastian [1 ]
Meyer, Franc [1 ]
机构：
[1] Univ Gottingen, Inst Anorgan Chem, Tammannstr 4, D-37077 Gottingen, Germany
[2] Northwestern Politech Univ, Sino German Joint Res Lab Space Biomat & Translat, Sch Life Sci, Xian 710072, Peoples R China
来源：
CHEMICAL COMMUNICATIONS | 2020年 / 56卷 / 27期
关键词：
SPIN-LATTICE-RELAXATION; ANISOTROPY BARRIER; EXCHANGE; MAGNETIZATION; BLOCKING;
D O I：
10.1039/c9cc09774k
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A hexanuclear cluster [(Cp*Dy)(6)K4Cl16(THF)(6)], [Cp*Dy](6), has been constructed from six {Cp*Dy-III} synthons in which the strongly coordinating Cp*(-) caps determine the local anisotropy axes. Structural characterization of [Cp*Dy](6) shows two almost parallel triangular (Cp*Dy)(3) fragments that are linked by the K+ and Cl- ions. Magnetic measurements reveal slow thermal relaxation and fast quantum tunneling relaxation in the absence of an external dc field. After applying a weak dc field, the quantum tunneling relaxation is efficiently suppressed, giving a sizable energy barrier of 561 K, which represents the current record energy barrier for high nuclearity organometallic SMMs.
引用
收藏
页码：3887 / 3890
页数：4
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