Copper(II) Sensing Properties of Colorimetric and Fluorimetric Chemosensors Based on 7-Dimethylaminocoumarin Chromophores
Two 7-dimethylaminocoumarin-based derivatives were prepared, and their metal ion sensing properties were investigated. One compound showed a selective chromogenic behavior toward Cu2+ ion by changing the color of the solution from colorless to greenish-yellow. The other ionophore exhibited a pronounced Cu2+-selective fluoroionophoric property among the representative transition- and heavy-metal ions in aqueous DMSO solution. The fluorescence was efficiently quenched with 1 equiv of Cu2+ ion, and the detection limit was found to be 1.5 × 10−7 M.
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Document Type: Research Article
Publication date: August 1, 2010
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