Highly Selective Colorimetric and Fluorometric Probes for Fluoride Ions Based on Nitrobenzofurazan‐containing Polymers

作者：Jinming Hu, Changhua Li, Yue Cui, Shiyong Liu · 发表于：Macromolecular Rapid Communications · 年份：2011 · DOI：10.1002/marc.201100024 · 被引用次数：31 · 研究领域：Molecular Sensors and Ion Detection、Luminescence and Fluorescent Materials、Advanced biosensing and bioanalysis techniques

We report on a novel colorimetric and fluorometric chemosensor for fluoride ions based on 4-(2-acryloyloxyethylamino)-7-nitro-2,1,3-benzoxadiazole (NBDAE)-labeled polymers. Upon gradual addition of fluoride ions (F⁻), the green fluorescence emission of NBDAE moieties can be dramatically quenched, accompanied with the distinct colorimetric transition from green to yellow. NBDAE moieties are capable of selectively recognizing F⁻ ions via hydrogen-bonding (H-bonds) interactions at low F⁻ concentration and subjected to further deprotonation process at high F⁻ concentration. NBDAE-labeled polymers in organic solvents possess high selectivity and fluorescence "turn-off" characteristics toward the sensing of F⁻ ions with the detection limit down to ≈ 0.8 µM.