Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1521215 | Materials Chemistry and Physics | 2015 | 5 Pages |
Abstract
A novel optical sensor for sensitive and selective determination of copper ions in aqueous solution based on a novel calix[4]dicyano-diimidazole ionophore was prepared. The newly synthesized calix[4]dicyano-diimidazole exhibited obvious absorbance enhancement at 284Â nm in the presence of copper ions. At pH 6.8, the measuring range of the optode membrane for Cu2+ ions was from 1.0Â ÃÂ 10â8 to 1.0Â ÃÂ 10â4Â M with a detection limit of 7.0Â ÃÂ 10â9Â M. Furthermore, the response time of the proposed optical device was within 10Â min. With the optimum condition described, the optical sensor revealed good selectivity toward Cu2+ ions in comparison with common coexisting cations (Hg2+, Pb2+, Cd2+, Ni2+ and Zn2+). Finally, the reproducibility, regeneration, reversibility and repeatability of this optical sensor were discussed.
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Electronic, Optical and Magnetic Materials
Authors
A. Rouis, U. Darbost, I. Bonnamour, H. Ben Ouada,