摘要
8-羟基喹啉-5-偶氮-4’-对二甲氨基苯(1)在乙腈中发射双重荧光,其波长分别为512 nm和370 nm,加入F-后,长波处的荧光猝灭,短波处的荧光增强。同时1的吸收光谱和溶液颜色均发生明显变化。结果表明1通过氢键作用与F-形成了1:1型配合物,结合常数为5.0×104mol-1.L,其它阴离子的存在均不影响1的吸收光谱和荧光光谱,表明1对F-有很高的选择性。据此建立了荧光比值法与裸眼比色法检测F-的方法。
8 - hydroxyl - quinoline - 5 - azo - 4＇ - dimethylaminobenzene （ 1 ） emitted dual fluorescence bands peaked at 512 nm and 370 nm in acetonitrile. The introduction of fluoride ion （ F^ - ） caused the quenching of the long wavelength fluorescence and the increase of short wavelength fluorescence. Meanwhile absorption spectra and color of 1＇ s solution underwent dramatic changes. The results displayed a 1 ： 1 complex formation between 1 and F^- via hydrogen bonding interaction and its binding constant was estimated as 5.0 × 10^4 mol^-1 . L. 1 showed high selectivity towards F^-. Thus fluorescence ratiometric assay and colorimetric assay for F^- were developed.
出处
《南昌大学学报（理科版）》
CAS
北大核心
2007年第4期355-357,共3页
Journal of Nanchang University(Natural Science)
基金
江西省教育厅资助项目(2005-38)
湖南大学化学生物传感器与计量学国家重点实验室资助项目(2005018)
江西省自然科学基金资助项目(JXNSFNo.0420041)
关键词
喹啉偶氮衍生物
氟离子
阴离子识别
裸眼检测
荧光比值法
azo - quinoline derivative
F -
anion recognition
naked eye detection
ratio fluorescence assay
