Synthesis, Structures, and Magnetic Properties of Three Decanuclear Ln2Cu8 Clusters of Alkylsulfonate

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• 作者：Han Zhang ; Gui-Lin Zhuang ; Xiang-Jian Kong ; Yan-Ping Ren ; La-Sheng Long ; Rong-Bin Huang ; Lan-Sun Zheng
• 刊名：Crystal Growth & Design
• 出版年：2013
• 出版时间：June 5, 2013
• 年：2013
• 卷：13
• 期：6
• 页码：2493-2498
• 全文大小：406K
• 年卷期：v.13,no.6(June 5, 2013)
• ISSN：1528-7505

文摘

Three isomorphic decanuclear heterometallic 3d鈥?f Ln₂Cu₈ clusters, formulated as [Ln₂Cu₈(渭₂-OH)₂(渭₃-OH)₂(ClO₄)₂(HTMHSA)₄(H₂O)₁₀]路15H₂O (Ln = La (1, La₂Cu₈); Ln = Gd (2, Gd₂Cu₈); Ln = Dy (3, Dy₂Cu₈), H₅TMHSA = 3-[N-tris(hydroxymethyl)methylamino]-2-hydroxyprop-anesulfonic acid), were obtained through the reaction of H₅TMHSA, Ln(ClO₄)₃, and Cu(NO₃)₂路3H₂O. The present three Ln₂Cu₈ compounds are rare examples of alkylsulfonate-based polynuclear 3d鈥?f clusters. Magnetic studies indicate that the cluster La₂Cu₈ exhibits antiferromagnetic behavior, Gd₂Cu₈ displays ferromagnetic behavior and a large magnetocaloric effect at low temperature, while Dy₂Cu₈ shows slow magnetic relaxation.