Tetrametallic macrocyclic frameworks constructed from ferrocenedicarboxylato and 2,2-bipyridine: synthesis, molecular structures and characteristics |
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| Authors: | Xiangru Meng Gang Li Tiezhu Ge Yu Zhu |
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| Institution: | a Department of Chemistry, Zhengzhou University, Henan 450052, PR China
b Department of Material and Biological Chemistry, Faculty of Science, Yamagata University, Kojirakawa, Yamagata 900-8560, Japan |
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| Abstract: | Four novel tetranuclear macrocyclic compounds Cd2(η2-O2CFcCO2)2(2,2′-bpy)2(H2O)2] · 2H2O (1), Zn2(η2-O2CFcCO2)2(2,2′-bpy)2(H2O)2] · CH3OH · H2O (2), Co2(O2CFcCO2)2(2,2′-bpy)2(μ2-OH2)2] · CH3OH · 2H2O (3), and Ni2(O2CFcCO2)2(2,2′-bpy)2(μ2-OH2)2] · CH3OH · 2H2O (Fc=(η5-C5H4)Fe(η5-C5H4) (4) have been synthesized and structurally characterized by single crystal diffraction. The magnetic behaviors for compounds (3) and (4) are studied in the temperature range of 5.0-300 K. The results show that the antiferromagnetic coupling of CoII-CoII pairs occurs in (3), and unusual global ferromagnetic coupling between nickel (II) ions exists in (4). The solution-state differential pulse voltammetries of compounds (1)-(4) all show two peaks with large separations (ΔE) that indicate strong interactions between two ferrocene moieties. Their fluorescent and thermal properties were also investigated. |
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| Keywords: | Tetranuclear macrocyclic compound Magnetic properties Electrochemical properties Luminescence properties |
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