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Effects of imidazolium room temperature ionic liquids on the fluorescent properties of norfloxacin
Author(s) -
Zou Yujie,
Wang Huili,
Wang Wenwei,
Ma Meiping,
Wang Ping,
Wang Chengjun,
Wang Xuedong
Publication year - 2011
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.1382
Subject(s) - ionic liquid , norfloxacin , fluorescence , chemistry , organic chemistry , optics , ciprofloxacin , biochemistry , physics , catalysis , antibiotics
The effects of 12 imidazolium room temperature ionic liquids (RTILs), including [C n mim]BF 4 , [C n mim]PF 6 , and [C n mim]Br ( n = 4, 6, 8, 10), on the fluorescent properties of norfloxacin were examined. The fluorescence intensity of norfloxacin at 0.1 mg/L in methanol significantly increased with the addition of [C n mim]BF 4 and [C n mim]PF 6 into the solvent at 0.1–15.0%. The sensitizing effect may result from the higher viscosity of the RTILs–methanol mixture solvent than that of the methanol itself. However, the quenching effect on fluorescence of norfloxacin was observed in [C n mim]Br–methanol solvent. The fluorescence intensities of norfloxacin decreased with an increase in the alkyl chain length of the alkyl substituents of the imidazolium ring of RTILs. The main interaction between the RTILs and norfloxacin is not by hydrogen bonding. The fact, that some RTILs can significantly sensitize fluorescence of norfloxacin, indicates that RTILs could be a group of promising solvents for development of sensitive spectrofluorimetric methods for determination of norfloxacin at ultra‐trace levels in environmental samples. Copyright © 2011 John Wiley & Sons, Ltd.