【摘要】 合成了7-(4-安替吡啉偶氮)-8-羟基喹啉,考察了滴加顺序、反应温度、偶合反应时间、溶剂对反应的影响。产物的结构经红外光谱及核磁共振谱进行表征。研究在pH4.5的NaAc-HAc缓冲介质中显色剂与In( )的显色反应特性。结果表明:试剂与In( )形成3∶1的黄色配合物,配合物的最大吸收波长位于482nm,表观摩尔吸光系数ε=1.9×104L/(mol·cm),铟的浓度在0～20μg/25mL范围内符合比耳定律。更多还原

【Abstract】 7-(4-Antipyrinylazo)-8-hydroxyquinoline was synthesized. The effect of order of dropping, temperature, time and solvent on the reaction was investigated. The structure of the product was identified by IR spectroscopy and ()~1H NMR spectroscopy. The spectrophotometric reaction of the reagent with indium was investigated. The results showed that in NaAc-HAc buffer solution with pH value of 4.5 7-(4-antipyrinylazo)-8-hydroxyquinoline reacts with indium to form a yellow 3∶1 complex. The maximum absorption wavelength of the complex is at 482 nm and its apparent molar absorptivity is 1.9×10~4 L/(mol·cm). Beer’s law is obeyed in the range of 0 to 20 μg of indium per 25 mL.更多还原