Di-, Tetra-, and Hexanuclear Hydroxy-Bridged Copper(II) Cluster Compounds: Syntheses, Structures, and Properties

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• 作者：Xing Li ; Deyi Cheng ; Jianli Lin ; Zhifeng Li ; Yueqing Zheng
• 刊名：Crystal Growth & Design
• 出版年：2008
• 出版时间：August 2008
• 年：2008
• 卷：8
• 期：8
• 页码：2853-2861
• 全文大小：370K
• 年卷期：v.8,no.8(August 2008)
• ISSN：1528-7505

文摘

Self-assembly reactions of copper (II) ions, dicarboxylate (adipate or terephthalate) and terminal ligands (4,4′-bipyridine or phenanthroline) yielded three hydroxy-bridged Cu(II) cluster complexes: [Cu(phen)(OH)(H₂O)]₂·(C₈H₄O₄)·8H₂O (1), [Cu₄(bpy)₄(OH)₄(H₂O)₂]·(C₈H₄O₄)₂·6H₂O (2) and [Cu₆(bpy)₆(OH)₆(H₂O)₂]·(C₆H₈O₄)₃·23H₂O (3) (phen = phenanthroline, bpy = 2,2′-bipyridine, C₈H₆O₄ = terephthalic acid, C₆H₁₀O₄ = adipic acid). Single crystal X-ray diffraction analyses reveal that complex 1 is a discrete dinuclear Cu₂O₂ motif, 2 presents a discrete chairlike tetranuclear copper(II) Cu₄O₄ core formed by two Cu₂O₂ units, and 3 assumes a discrete hexameric copper(II) Cu₆O₆ cluster consisting of three Cu₂O₂ units. The polynuclear structures are generated from the Cu(II) ions linked by the µ₂- and/or µ₃-OH groups. In 1−3, all Cu(II) ions show square pyramidal coordination geometry, and the dicarboxylate ions act as counteranions to keep the whole structure neutral. Thermogravimetric analyses (TGA) and magnetic properties of 1−3 were studied, respectively.