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Sensors 2011, 11(5), 4598-4608; doi:10.3390/s110504598
Article

Fluorescent Sensing of Chlorophenols in Water Using an Azo Dye Modified β-Cyclodextrin Polymer

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Received: 9 February 2011; in revised form: 14 March 2011 / Accepted: 22 April 2011 / Published: 27 April 2011
(This article belongs to the Section Physical Sensors)
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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 and 1H-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 × 103 M−1 for 2,4-dichlorophenol and 1.120 × 102 M−1 for 4-chlorophenol.
Keywords: fluorescence; chemosensor; chlorinated by-product; azo dye; β-cyclodextrin polymer fluorescence; chemosensor; chlorinated by-product; azo dye; β-cyclodextrin polymer
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Ncube, P.; Krause, R.W.; Mamba, B.B. Fluorescent Sensing of Chlorophenols in Water Using an Azo Dye Modified β-Cyclodextrin Polymer. Sensors 2011, 11, 4598-4608.

AMA Style

Ncube P, Krause RW, Mamba BB. Fluorescent Sensing of Chlorophenols in Water Using an Azo Dye Modified β-Cyclodextrin Polymer. Sensors. 2011; 11(5):4598-4608.

Chicago/Turabian Style

Ncube, Phendukani; Krause, Rui W.; Mamba, Bhekie B. 2011. "Fluorescent Sensing of Chlorophenols in Water Using an Azo Dye Modified β-Cyclodextrin Polymer." Sensors 11, no. 5: 4598-4608.


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