Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 213, Issue 9, Pages 887-892Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201200100
Keywords
anionic surfactants; colorimetric sensing; conjugated polymers; fluorescence; iodide ion
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A new cationic polythiophene derivative poly[3-(1,1'-dimethyl-4-piperidinemethylene)thiophene-2,5-diyl chloride] (PDPMT-Cl) is synthesized and applied as a colorimetric and fluorometric probe for the detection of iodide ion and anionic surfactants with high selectivity and sensitivity. Upon adding iodide ion or anionic surfactant into the aqueous solution of PDPMT-Cl, the maximum absorption of the polymer is blue-shifted with a naked-eye color change from red-violet to yellow, signifying that iodide ion or anionic surfactants can cause the dissociation of PDPMT-Cl aggregates. More sensitive results are obtained in the fluorometric detection to iodide ion or anionic surfactant, thereinto, the detection limit to surfactants can be extended to the order of 10-9 M.
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