几种8-氨基喹啉偶氮衍生物的合成及其与钴的显色反应研究

Synthesis of four 8 aminoquinoline 5 azo derivatives and their colour reactions with cobalt

合成了４种多取代的８－氨基喹啉偶氮类新试剂。研究了它们与钴（Ⅱ）的显色反应。在表面活性剂的存在下，试剂与钴（Ⅱ）均有较高的反应灵敏度。对５－［（２－羧基－４－硝基苯基）偶氮］－８－氨基喹啉（ＮＣＰＡＱ）与钴（Ⅱ）的显色反应进行了较为系统的研究，配合物的吸收峰位于６６０ｎｍ，摩尔吸光系数为１．１５×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，钴的量在０～１５μｇ／２５ｍＬ范围内符合比尔定律。

Four 8 aminoquinoline 5 azo derivatives were synthesized.Their colour reaction with cobalt(Ⅱ) was investigated.In the presence of cationic surfactant CTMAB,NCPAQ reacts with cobalt(Ⅱ) to form a blue complex,exhibiting a maximum absorbance at 660nm,The molar absorptivity is 1 15×10 5L·mol -1 ·cm -1 ,Beer′s law is obeyed over the range of 0～15μg/25mL.