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通过水热法成功合成一个新的含N杂环二羧酸配体和草酸根离子的稀土配合物,其结构式为{[Gd2(Hpimda)2(μ4-C2O4).2H2O].2H2O}n(H3pimda为2-(吡啶-4-基)-1H-4,5-咪唑二羧酸),并对该配合物进行了表征.结构分析表明该配合物呈现草酸根离子作为柱子的三维框架结构,H3pimda配体把Gd(Ⅲ)离子连接成二维层状结构,进一步堆积形成一维通道,其中容纳着自由水和配位水分子.磁性研究表明,一维链内相邻的两个顺磁中心Gd(Ⅲ)离子之间存在着弱的反铁磁相互作用.
A new rare earth complex containing N-heterocyclic dicarboxylic acid ligand and oxalate ion was successfully synthesized by hydrothermal method. The structure of the rare earth complex was {[Gd2 (Hpimda) 2 (μ4-C2O4) .2H2O] .2H2O} n H3pimda is 2- (pyridin-4-yl) -1H-4,5-imidazolecarboxylic acid), and its structure has been characterized by structural analysis.The results show that the complex presents oxalate ion as the three-dimensional framework of the column, The H3pimda ligand connects Gd (Ⅲ) ions into a two-dimensional layered structure and further accumulates to form a one-dimensional channel, which contains free water and coordination water molecules. Magnetic studies show that two adjacent paramagnetic There is a weak antiferromagnetic interaction between Gd (Ⅲ) ions in the center.