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Issue 9, 2012
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A novel polythiophene derivative as a sensitive colorimetric and fluorescent sensor for anionic surfactants in water

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Abstract

A novel cationic polythiophene derivative, poly[N,N,N-trimethyl-4-(thiophen-3-ylmethylene)cyclohexanaminium chloride] (PTCA-Cl), has been prepared successfully and applied as a colorimetric and fluorometric probe for the detection of anionic surfactants. In particular, a new method for the polymerization of cationic polythiophene derivatives is found, which has not been reported previously. The colorimetric and fluorescent response of PTCA-Cl to anionic surfactants have been investigated by absorption and emission spectroscopy. The sensing interaction can be apparently observed by the naked eye, which presents a great advantage for its practical applications. Moreover, the sensor (PTCA-Cl) shows high selectivity towards anionic surfactants in the presence of other negatively charged analytes, as well as high sensitivity with a detection limit at 10−9 M by using fluorimetry, which is the lowest ever achieved among all synthetic anionic surfactants sensors available. Therefore, the water soluble polythiophene derivative can be applied as a colorimetric and fluorescent probe for the detection of anionic surfactants with high selectivity and sensitivity.

Graphical abstract: A novel polythiophene derivative as a sensitive colorimetric and fluorescent sensor for anionic surfactants in water

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Supplementary files

Article information


Submitted
08 May 2012
Accepted
02 Jul 2012
First published
04 Jul 2012

New J. Chem., 2012,36, 1897-1901
Article type
Paper

A novel polythiophene derivative as a sensitive colorimetric and fluorescent sensor for anionic surfactants in water

L. Wang, Q. Feng, X. Wang, M. Pei and G. Zhang, New J. Chem., 2012, 36, 1897
DOI: 10.1039/C2NJ40460E

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