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

✍ Scribed by Jinming Hu; Changhua Li; Yue Cui; Shiyong Liu

Publisher: John Wiley and Sons
Year: 2011
Tongue: English
Weight: 450 KB
Volume: 32
Category: Article
ISSN: 1022-1336
DOI: 10.1002/marc.201100024

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✦ Synopsis

Abstract

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. magnified image

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