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首页> 外文期刊>Chemistry: A European journal >Rational Design of a Lanthanide-Based Complex Featuring Different Single-Molecule Magnets
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Rational Design of a Lanthanide-Based Complex Featuring Different Single-Molecule Magnets

机译：具有不同单分子磁体的镧系元素络合物的合理设计

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摘要

The rational synthesis of the 2-{1-methylpyridine-N-oxide-4,5-[4,5-bis(propylthio)tetrathiafulvalenyl]-1H-benzimidazol-2-yl}pyridine ligand (L) is described. It led to the tetranuclear complex [Dy-4(tta)(12)(L)(2)] (Dy-Dy-2-Dy) after coordination reaction with the precursor Dy(tta)(3)center dot 2H(2)O (tta(-) = 2-thenoyltrifluoroacetonate). The X-ray structure of Dy-Dy2-Dy can be described as two terminal mononuclear units bridged by a central antiferromagnetically coupled dinuclear complex. The terminal N2O6 and central O-8 environments are described as distorted square antiprisms. The ac magnetism measurements revealed a strong out-of-phase signal of the magnetic susceptibility with two distinct sets of data. The high-and low-frequency components were attributed to the two terminal mononuclear single-molecule magnets (SMMs) and the central dinuclear SMM, respectively. A magnetic hysteresis loop was detected at very low temperature. From both structural and magnetic points of view, the tetranuclear SMM Dy-Dy-2-Dy is a self-assembly of two known mononuclear SMMs bridged by a known dinuclear SMM.
机译：描述了2- {1-甲基吡啶-N-氧化物-4，5- [4，5-双（丙硫基）四硫富瓦烯基] -1H-苯并咪唑-2-基}吡啶配体（L）的合理合成。与前体Dy（tta）（3）中心点2H（2）配位反应后，生成四核复合物[Dy-4（tta）（12）（L）（2）]（Dy-Dy-2-Dy） ）O（tta（-）= 2-thenoyltrifluoroacetonate）。 Dy-Dy2-Dy的X射线结构可以描述为由中央反铁磁耦合的双核络合物桥接的两个末端单核单元。终端N2O6和O-8中心环境被描述为扭曲的方形反棱镜。交流磁性测量结果显示，磁化率的强烈异相信号带有两组不同的数据。高频和低频成分分别归因于两个末端单核单分子磁体（SMM）和中央双核SMM。在非常低的温度下检测到磁滞回线。从结构和磁性的角度来看，四核SMM Dy-Dy-2-Dy是由已知双核SMM桥接的两个已知单核SMM的自组装。

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