Abstract
A novel molecularly imprinted fluorescent sensor for the determination of 4-nitroaniline (4-NA) was synthesized via free radical polymerization with 3-[(7-methoxy-2-oxo-2H-chromen-4-yl)methyl]-1-vinyl-1H-imidazol-3-ium bromide as the fluorescence functional monomer, 4-NA as the template molecule, ethylene glycol dimethacrylate as the cross-linker, and 2,2′-azo(bisisobutyronitrile) as the initiator. The obtained fluorescent poly(ionic liquid) was characterized through Fourier transform infrared, scanning electron microscopy, Brunauer–Emmett–Teller analysis, and fluorescence spectrophotometry. The fluorescent sensor had high fluorescence intensity, short detection time (0.5 min), good selectivity, and excellent sensitivity (limit of detection = 0.8 nM) for 4-NA, with good linear relationships of 2.67–10,000 nM. The practical applicability of the fluorescence sensor in detecting 4-NA in industrial wastewater and spiked environmental water was demonstrated, and a satisfactory result was obtained.
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Funding
This research is supported by the National Natural Science Foundation of China (Nos. 21677060 and 51503079), the Public Welfare Technology Research Project of Zhejiang Province (Nos. LGF18B050004 and LGC19B050007), the Natural Science Foundation of Zhejiang Province (No. LY20B050009), and the Science and Technology Plan Project of Jiaxing City, China (Nos. 2017AY33034 and 2018AY11002).
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Industrial wastewater was provided by a chemical factory in Jiangsu Province (China), and it was authorized by the chemical factory to be used for the study.
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Xie, W., Zhang, J., Zeng, Y. et al. Highly sensitive and selective detection of 4-nitroaniline in water by a novel fluorescent sensor based on molecularly imprinted poly(ionic liquid). Anal Bioanal Chem 412, 5653–5661 (2020). https://doi.org/10.1007/s00216-020-02785-4
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DOI: https://doi.org/10.1007/s00216-020-02785-4