Fluorescent sensing of chlorophenols in water using an azo dye modified β-cyclodextrin polymer

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Abstract

A water soluble azo dye modified β-cyclodextrin polymer 4 was synthesized and used as a chemosensor for the detection of chlorinated phenols, model chlorinated by-products (CBPs) of water treatment for drinking purposes. The characterization of the intermediates and the azo dye modified β-CD polymer was done by UV/Vis Spectrophotometry, FT-IR and1H-NMR spectroscopies. The chlorophenols were capable of quenching the fluorescence of the polymer. The polymer showed greater sensitivity towards 2,4-dichlorophenol, with a sensitivity factor of 0.35 compared to 0.05 and 0.12 for phenol and 4-chlorophenol, respectively. The stability constants (Ks) of the pollutants were also determined by the Benesi-Hildebrand method to be 2.104 × 103M-1for 2,4-dichlorophenol and 1.120 × 102M-1for 4-chlorophenol. © 2011 by the authors; licensee MDPI, Basel, Switzerland.

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Ncube, P., Krause, R. W., & Mamba, B. B. (2011). Fluorescent sensing of chlorophenols in water using an azo dye modified β-cyclodextrin polymer. Sensors, 11(5), 4598–4608. https://doi.org/10.3390/s110504598

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