Hexanuclear [Cp*Dy]6 single-molecule magnet,Chemical Communications

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Hexanuclear [Cp*Dy]6 single-molecule magnet
Chemical Communications ( IF 4.3 ) Pub Date : 2020/02/27 , DOI: 10.1039/c9cc09774k
Jianfeng Wu _{1,

2,

3,

4,

5} , Serhiy Demeshko _{1,

2,

3,

4} , Sebastian Dechert _{1,

2,

3,

4} , Franc Meyer _{1,

2,

3,

4}

Affiliation

A hexanuclear cluster [(Cp*Dy)₆K₄Cl₁₆(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.

中文翻译：

六核[Cp * Dy] 6单分子磁体

六核簇[（Cp * Dy）₆ K ₄ Cl ₁₆（THF）₆ ]，[Cp * Dy] ₆由六个{Cp * Dy ^III }合子构成，其中强配位的Cp * ^-帽决定了局部各向异性轴。的结构表征的[Cp *的Dy] _6只显示了两个几乎平行的三角形（CP * DY）_3个由K个链接的片段⁺和Cl ^-离子。磁测量显示在没有外部直流场的情况下，缓慢的热弛豫和快速的量子隧穿弛豫。在施加弱的dc场后，有效地抑制了量子隧穿弛豫，提供了561 K的相当大的能垒，这代表了当前记录的高核有机金属SMM的能垒。

更新日期：2020-04-03

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