A series of mononuclear lanthanoidate complexes isolated as [Bu₄N][Ln(QCl₄)] 1Ln (QCl = 5-chloro-8-quinolinolate; Ln = Eu, Gd, Tb, Dy, Ho, and Er) have been prepared, characterised, and used as facile precursors to obtain a series of new heterobimetallic complexes as crystalline materials. Reaction of 1Ln with manganese nitrate forms [Ln₂Mn(QCl)₈] (2Ln, where Ln = Tb, Dy, Er and Yb) which have been structurally characterised in the cases of 2Tb and 2Yb. The heteroleptic trinuclear complex [Dy₃(QCl)₈Cl(OH₂)], 3, has also been obtained. Compounds 1Dy, 1Tb, and 1Er display slow relaxation of magnetisation below 10K, particularly for the prolate Er³⁺ ion. These results also suggest that the positive effects of the change from mononuclear to trinuclear lanthanoid complexes enhance their single molecule magnetic (SMM) behaviour, as evidenced by the well resolved frequency dependent AC out-of-phase susceptibility maxima seen in the 2Ln systems, that have been analysed quantitatively. The synthesis used here provides a promising strategy in obtaining heterobimetallic complexes with quinolinolate ligands and also constructing efficient heterobimetallic SMMs.

中文翻译：

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异双金属三核配合物[Ln-Mn-Ln]的高效合成路线及其单分子磁性

一系列单核镧系配合物被分离为 [Bu ₄ N][Ln(QCl ₄ )] 1Ln (QCl = 5-chloro-8-quinolinolate; Ln = Eu, Gd, Tb, Dy, Ho, and Er) ，表征并用作简便的前体以获得一系列新的异质双金属配合物作为结晶材料。1Ln与硝酸锰的反应形成 [Ln ₂ Mn(QCl) ₈ ]（2Ln，其中 Ln = Tb、Dy、Er 和 Yb），其结构已在2Tb和2Yb的情况下表征。杂配三核络合物 [Dy ₃ (QCl) ₈ Cl(OH ₂ )], 3，也获得了。化合物1Dy、1Tb和1Er在低于 10K 时表现出缓慢的磁化弛豫，尤其是扁长 Er ³⁺离子。这些结_进行了定量分析。这里使用的合成为获得具有喹啉配体的异双金属配合物以及构建高效的异双金属 SMM 提供了一种有前途的策略。