镉(Ⅱ)/均苯四甲酸体系下新型配位聚合物的合成、晶体结构及荧光性质研究

Synthesis,crystal structure and fluorescence properties of new coordination polymer in cadmium(Ⅱ)/benzenetetracarboxylic acid system

水热条件下,在Cd/1,2,4-三氮唑(Htrz)/均苯四甲酸(btec)体系中得到新型配位聚合物[Cd(btec)_(0.5)(H_2O)_3]_n(化合物1).化合物1中,每个均苯四甲酸配体与4个Cd(Ⅱ)离子配位,形成二维层状配合物,层与层之间交错排列.从晶体结构可见,1,2,4-三氮唑没有出现在目标化合物中,对此合成条件进行了分析,结果表明,1,2,4-三氮唑加入与否可对结晶质量产生影响.此外,还考察了合成过程中的反应物物料配比和反应溶剂的影响.室温固态荧光测试显示,配合物在359nm(λmax)处具有荧光吸收.

The new coordination polymer[Cd（btec）_（0.5）（H_2O）_3]_n（1）（1,2,4,5-benzenetetracarboxylic acid=H4 btec）was obtained in the Cd/1,2,4-triazole（Htrz）/btec system under hydrothermal conditions.In compound 1,each btec ligand is coordinated with four Cd（Ⅱ）ion to form the two-dimensional layer,which are staggered between layers.According to the crystal structure of 1,the 1,2,4-triazole did not appear in the target compounds.We have analyzed the synthesis conditions of 1,the results show that the trz ligand can affect the quality of the crystal.In addition,we have also investigated the effects of reactant ratio and solvent in the synthesis process.The compound1 shows fluorescence absorption at 359 nm（λmax）in the solid state at room temperature.