Scholarlink

<p>Lanthanide sandwich complexes are promising candidates for single-molecule magnets, owing to their magnetic anisotropy and slow relaxation of magnetization. Here we show the synthesis and characterization of the polymeric yttrium and erbium complexes ligated by cyclooctatetraendiide and stannolediide ligands. The molecular structures showed the formation of one-dimensional-coordination polymers with the molecular formula of C<sub>40</sub>H<sub>56</sub>KOSi<sub>2</sub>SnLn (Ln = Y, Er), which resemble a trapezoidal wave. Upon encapsulation of the K cations with 2.2.2-cryptand, the respective monomeric sandwich complexes having the molecular formula of C<sub>57</sub>H<sub>87</sub>KN<sub>2</sub>O<sub>6</sub>Si<sub>2</sub>SnLn (Ln = Y, Er) were obtained. The diamagnetic yttrium complexes were characterized by NMR spectroscopy, and the magnetic properties of both Er complexes were studied. The polymeric Er complex demonstrates a lower energy barrier for magnetic relaxation compared to the monomeric erbium complex, despite the similar structural features of the compounds.</p><p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Magnetic properties of monomeric and polymeric stannolediide yttrium and erbium complexes

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月21日

查看全文
  • Xiaofei Sun,
  • Sören Schlittenhardt,
  • Tingting Ruan,
  • Masaichi Saito,
  • Mario Ruben,
  • Peter W. Roesky

摘要

Lanthanide sandwich complexes are promising candidates for single-molecule magnets, owing to their magnetic anisotropy and slow relaxation of magnetization. Here we show the synthesis and characterization of the polymeric yttrium and erbium complexes ligated by cyclooctatetraendiide and stannolediide ligands. The molecular structures showed the formation of one-dimensional-coordination polymers with the molecular formula of C40H56KOSi2SnLn (Ln = Y, Er), which resemble a trapezoidal wave. Upon encapsulation of the K cations with 2.2.2-cryptand, the respective monomeric sandwich complexes having the molecular formula of C57H87KN2O6Si2SnLn (Ln = Y, Er) were obtained. The diamagnetic yttrium complexes were characterized by NMR spectroscopy, and the magnetic properties of both Er complexes were studied. The polymeric Er complex demonstrates a lower energy barrier for magnetic relaxation compared to the monomeric erbium complex, despite the similar structural features of the compounds.