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Highly Selective Colorimetric and Fluorometric Probes for Fluoride Ions Based on Nitrobenzofurazan‐containing Polymers
Author(s) -
Hu Jinming,
Li Changhua,
Cui Yue,
Liu Shiyong
Publication year - 2011
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201100024
Subject(s) - deprotonation , fluoride , fluorescence , detection limit , chemistry , polymer , ion , selectivity , hydrogen bond , nitro , photochemistry , inorganic chemistry , polymer chemistry , nuclear chemistry , molecule , organic chemistry , chromatography , catalysis , physics , quantum mechanics , alkyl
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 µ M .