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以一种尿素的衍生物2-咪唑烷酮为溶剂,采用脲热法合成了一个新的配位聚合物[Cd(NH2bdc)(e-urea)]n(1)(H2NH2bdc为2-氨基对苯二甲酸,e-urea为2-咪唑烷酮),并对其结构和荧光性质进行了研究。单晶结构分析结果表明,标题化合物的中心镉(Ⅱ)离子分别与2-氨基对苯二甲酸根配体的羧基氧原子和溶剂氧原子配位形成七配位的变形五角双锥结构。相邻的中心镉(Ⅱ)离子通过溶剂氧原子和配体羧基基团的连接,形成无限的一维链。这些一维的链进一步通过2-氨基对苯二甲酸根配体的连接最终形成了具有一维孔道的三维框架结构。研究表明,该化合物在室温下能发出较强的蓝色荧光。
A novel coordination polymer [Cd (NH2bdc) (e-urea)] n (1) was synthesized by the urea-thermal method using a urea derivative, 2-imidazolidinone Phthalic acid, e-urea is 2-imidazolidinone), and its structure and fluorescence properties were studied. The results of single crystal structure analysis show that the central cadmium (Ⅱ) ion of the title compound coordinates with the carboxyl oxygen atom and the solvent oxygen atom of 2-aminoterephthalate ligand respectively to form a hepta-coordinated pentagonal bipyramidal structure. The adjacent central cadmium (II) ions form an infinite one-dimensional chain through the attachment of the solvent oxygen atoms to the ligand carboxyl groups. These one-dimensional chains further form a three-dimensional framework structure with one-dimensional pores through the connection of 2-aminoterephthalate ligands. Studies have shown that the compound emits a strong blue fluorescence at room temperature.