Abstract

The complexes [Tb(Bipy)₂(H₂O)₂Cl₂]Cl (I), [Ln(Bipy)(H₂O)₆]Cl₃·2H₂O·0.5Bipy (Ln = Dy (II), Yb (IV)), [Er(Bipy)₂(H₂O)₃Cl]Cl₂·2H₂O (III), and [Yb(Bipy)(H₂O)₆]Cl₃ (V) were prepared using salts LnCl₃·6H₂O (Ln = Tb, Dy, Er, Yb) and 2,2'-bipyridine (Bipy). The structure of complex V was determined by X-ray diffraction (CIF file CCDC no. 2024688). Magnetic characteristics of the complexes indicate that the replacement of water molecules in the coordination sphere of aqua chlorides by bidentate Bipy ligand gives single-molecule magnets with significant barriers for magnetization reversal, especially in the case of ytterbium compound, ΔE/k_B([Yb(Bipy)(H₂O)₆]Cl₃·2H₂O·0.5Bipy) = 43 K.

中文翻译：

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基于单核Aqua和Aqua-氯镧系元素（Tb，Dy，Er，Yb）与联吡啶的分子磁体

摘要

[Tb（Bipy）₂（H ₂ O）₂ Cl ₂ ] Cl（I），[Ln（Bipy）（H ₂ O）₆ ] Cl ₃ ·2H ₂ O·0.5Bipy（Ln = Dy（II）） ，Yb（IV）），[Er（Bipy）₂（H ₂ O）₃ Cl] Cl ₂ ·2H ₂ O（III）和[Yb（Bipy）（H ₂ O）₆ ] Cl ₃（V）为用盐LnCl ₃ ·6H ₂制备O（Ln = Tb，Dy，Er，Yb）和2,2'-联吡啶（Bipy）。配合物V的结构通过X射线衍射测定（CIF文件CCDC号2024688）。配合物的磁性特征表明，双齿Bipy配体取代了氯化物配位域中的水分子，使单分子磁体具有显着的磁化反转障碍，尤其是在compound化合物ΔE / k _B（[ Yb（Bipy）（H ₂ O）₆ ] Cl ₃ ·2H ₂ O·0.5Bipy）= 43K。