Hexanuclear [Cp*Dy]6 single-molecule magnet

被引：16

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

页码：3887 / 3890

页数：4

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