双[3-(4-溴苯)重氮氨基]-联苯的合成及分析应用  

Synthesis and Fluorescence Reaction of Bis[3-(4-Bromobenzene) diazoamino]–biphenyl

作　　者：章丽燕[1] 丘仙仙 何立芳[1] 

机构地区：[1]龙岩学院,福建龙岩364000

出　　处：《龙岩学院学报》2016年第2期106-110,共5页Journal of Longyan University

摘　　要：将联苯胺和4-溴苯胺结合,并引入杂环三氮烯结构,合成了新型荧光试剂双[3-（4-溴苯）重氮氨基]-联苯（简称BBDB）。其结构经红外光谱分析初步证实。研究结果表明,在碱性介质中,该试剂与Pb（Ⅱ）形成1：1的络合物,并在λex/λem=340 nm/419 nm处产生荧光增强作用。据此建立了三氮烯测定Pb（Ⅱ）的新型荧光分析法。该方法的线性范围为2.5×10-7~9.0×10-7mol/L,检出限为1.18×10-7mol/L。With the aid of combining of benzidine with 4-brominoaniline through triazene group,a new fluorescent reagent bis[3-（ 4-Bromobenzene） diazoamino]– biphenyl（ BBDB） was synthesized and confirmed by means of infrared spectra. A chelate complex was formed by the reaction between BBDB and Pb（ Ⅱ） in a weak basic medium,which resulted in the enhancement of fluorescence. The possible response mechanism of BBDB to Pb（ Ⅱ） was discussed. A new spectrofluorimetric method for the determination of trace Pb（ Ⅱ） with this reagent was developed. The excitation and emission wavelengths of BBDB / Pb（ Ⅱ） system were 340 and 419 nm in a basic medium respectively. Under optimal conditions,a linear response to mercury was obtained in the concentration range from 2.5×10-7to 9.0×10-5mol / L,and the detection limit was 1.18×10-7mol / L.

关 键 词：双[3-(4-溴苯)重氮氨基]-联苯 铅离子 荧光分析法 荧光增强 

分 类 号：O65[理学—分析化学]