共价固定芘衍生物荧光载体制备呋喃妥因传感器

摘要

A pyrene derivative fluorescent carrier with a terminal double bond, methylacryloylam-idepyrene (MAAP) was synthesized. With the carrier molecules immobilized on the quartz slides via light copolymerization, a new fluorescent sensor was fabricated for the determination of nitrofurantoin based on the fluorescence quenching of MAAP. The quenching mechanism was discussed. The sensor exhibited excellent stability, sufficient repeatability, good selectivity and long lifetime due to the prevention from leaching out of fluorescent carrier. The sensor showed linear responses toward nitrofurantoin in the concentration range of 8. 0 × 10-7 ～ 1. 0× 10 - 4 mol/L with a detection limit of 6. 0 × 10 -7 mol/L. The recovery for the determination of nitrofurantoin in water samples ranged from 96. 0% to 104. 0%.%合成了一种端基双键的芘衍生物荧光载体甲基丙烯酰胺基芘.基于光聚合反应将该荧光载体共聚固定于玻片表面,利用呋喃妥因对共价固定膜甲基丙烯酰胺基芘的猝灭作用,研制了一种测定呋喃妥因的荧光传感器.传感器避免了荧光载体的泄漏,具有较好的稳定性、重现性和选择性,使用寿命长.呋喃妥因测定的线性范围为8.0×10-7～1.0×10-4mol/L,检测限为6.0×10-7mol/L.将传感器用于水样中呋喃妥因的直接测定,回收率为96.0％～ 104.0％.