铜离子的偶氮苯化合物探针的制备、应用及实验教学研究

Preparation and Application of Probe Based on Azobenzene Compounds for Copper Ions and Experimental Teaching Research

以邻苯二胺为原料,在超氧化钾的氧化作用下合成了偶氮化合物——2,2′-二氨基偶氮苯,并通过紫外可见分光光度法分析2,2′-二氨基偶氮苯与铜离子的配位作用及定量关系,将合成的偶氮化合物制备成检测试纸,应用于实际水样中的铜离子检测。在实验基础上设计综合实验,实验内容按主题分为3部分:偶氮化合物的合成,偶氮化合物与铜离子配合物的组成及稳定常数的测定,铜检测试纸的制备与水样中铜离子的可视检测。实验涵盖有机化学、无机化学、分析化学的相关知识点与实验操作,适用对象为本科高年级学生。

Azo compound-2,2′-diaminoazobenzene was synthesized from o-phenylenediamine under the oxidation of potassium superoxide.The coordination interaction and quantitative relationship between 2,2′-diaminoazobenzene and copper ion was analyzed by ultraviolet-visible spectrophotometry.The azo compound was prepared into test paper and applied to the determination of copper ion in actual water samples.A comprehensive experiment was designed on the basis of the experiment.The experiment contents were divided into three parts according to the theme:synthesis of azo compounds,determination of the composition and stability constant of azo and copper complexes,preparation of copper detection test paper and visual detection of copper in water samples.The experiment covers the relevant knowledge points and operation of organic chemistry,inorganic chemistry and analytical chemistry,which is suitable for senior undergraduates.