一种偶氮化合物的合成及其铜离子识别性能研究  

Synthesis of An Azo Compound and Its Copper Ion Recognition Performance

作　　者：吕红 姜英豪 刘长俊 刘世娜 鲁敏 赵溪 黄磊 Lv Hong;Jiang Yinghao;Liu Changjun;Liu Shina;Lu min;Zhao xi;Huang lei(School of Materials and Chemical Engineering,West Anhui University,Lu’an 237012,China)

机构地区：[1]皖西学院材料与化工学院,安徽六安237012

出　　处：《广东化工》2022年第23期73-75,共3页Guangdong Chemical Industry

基　　金：皖西学院校级自然科学研究项目“水溶性偶氮基传感材料的设计合成与性能研究”(WXZR202013);大学生创新创业训练计划(wxxy2021043、wxxy2021035)资助。

摘　　要：本文以间苯二酚和3,5-二氨基-1,2,4-三氮唑为原料,通过重氮化和偶合反应制备得到一种偶氮化合物P,该探针合成方法简单、易于制备,产率较高。借助傅立叶变换红外光谱仪和1HNMR核磁共振仪表征了其化学结构,表征数据符合结构分析。该化合物能够在中性缓冲溶液中比色识别传感Cu^(2+),即Cu^(2+)的加入会使主体探针化合物395 nm处紫外吸收峰吸光度值快速下降,溶液颜色发生变化(溶液颜色由黄色变成黄褐色)而其他阳离子的加入不会引起光谱变化。通过A600nm/A395nm比值与目标物浓度关系得到在Cu^(2+)浓度0-2×10^(-5)mol/L范围两者有着良好线性关系,最低检测值达到3.1×10^(-8)mol/L。因此,该化合物探针P识别Cu^(2+)具有良好的选择性、灵敏性以及较低的检测限。通过乙二胺四乙酸与Cu^(2+)结合可逆性实验研究,发现随着Cu^(2+)的加入,探针P-Cu^(2+)溶液光谱可以恢复到原主体探针化合物P的光谱情况,说明了乙二胺四乙酸与Cu^(2+)络合能力比探针P-Cu^(2+)强,探针P与Cu^(2+)之间量是1∶2结合的。In this paper, an azo compound P was prepared from resorcinol and 3,5-diamino-1,2,4-triazole by diazotization and coupling reaction. The probe has the advantages of simple synthesis method, easy preparation and high yield. The structure was characterized by 1H NMR and IR. The compound can identify Cu^(2+)by colorimetry in neutral buffer solution, that is, the addition of Cu^(2+)will rapidly reduce the absorbance value of UV absorption peak at 395 nm of the main probe compound, while the addition of other cations will not cause spectral change, the color of the solution will change, and the color of the solution will change from yellow to yellowish brown. Through the relationship between A600nm/A395nm ratio and target concentration, there is a good linear relationship between them in the range of 0-2×10^(-5)mol/L Cu^(2+)and the lowest detection value is 3.1×10^(-8)mol/L. Therefore, the compound probe P has good selectivity, sensitivity and low detection limit. Through the experimental study on the reversibility of the combination of ethylenediaminetetraacetic acid and Cu^(2+), it is found that with the addition of Cu^(2+),the spectrum of probe P-Cu^(2+)solution can be restored to the spectrum of the original main probe compound P, which shows that the complexation ability of ethylenediaminetetraacetic acid with Cu^(2+)is stronger than that of probe P-Cu^(2+), and the ratio between probe P and Cu^(2+)is 1∶2.

关 键 词：间苯二酚 3 5-二氨基-1 2 4-三氮唑 偶氮化合物 比色识别 CU2+ 

分 类 号：TQ[化学工程]