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Synthesis and Characterization of Four Novel Supramolecular Compounds Based on Metal Zinc and Cadmium

机译:四种基于金属锌和镉的超分子化合物的合成与表征

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摘要

Four zinc(II)or cadmium(II)supramolecular compounds,namely,[Zn(ox)(Him)]n(1),[Zn(bta)2]n(2),[Zn(H2O)4(na)2]n(3),and [Cd2(ox)(OH)2]n(4)(ox = oxalate anion,Him = imidazole,bta = benzotriazole anion,and na = nicotinic anion),have been synthesized. Among them,1 is constructed to be a 3-D supramolecular framework by covalent and noncovalent interactions,2 containing two bta coordination modes displays a 2-D layer structure linked by covalent bonds,the 3-D network of 3 is mainly constructed by strong hydrogen bonds,while 4 exhibits a 3-D framework with 1-D channels only constructed by covalent interactions. The different metal centers and ligand dimensions result in the different structures although they were obtained from similar reaction systems. All of these compounds display strong fluorescence emissions in the blue region,which may be assigned to charge transfer between metal and ligand(for 1,3,and 4)and the pi ->pi* transition of bta(for 2).
机译:四种锌(II)或镉(II)超分子化合物,即[Zn(ox)(Him)] n(1),[Zn(bta)2] n(2),[Zn(H2O)4(na)合成了2] n(3)和[Cd2(ox)(OH)2] n(4)(ox =草酸根阴离子,Him =咪唑,bta =苯并三唑阴离子和na =烟酸根阴离子)。其中,1通过共价和非共价相互作用被构建为3-D超分子框架,2包含两个bta配位模式显示出通过共价键连接的2-D层结构,3的3-D网络主要是通过强键构建的氢键,而4展示了3-D框架,其中只有一维通道是通过共价相互作用构建的。尽管它们是从相似的反应系统中获得的,但不同的金属中心和配体尺寸导致了不同的结构。所有这些化合物在蓝色区域均显示出强烈的荧光发射,这可以归因于金属与配体之间的电荷转移(对于1,3,4)以及bta的pi-> pi *跃迁(对于2)。

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