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A single fluorescent chemosensor for multiple targets: the sequential detection of Al3+ and pyrophosphate and the selective detection of F- in a near-perfect aqueous solution

Abstract

A simple and easily-made chemosensor 1, based on 2-furoic hydrazide and diethylaminosalicylaldehyde moieties, was devised and synthesized. Sensor 1 showed the selective fluorescence change behavior toward three analytes in a near-perfect aqueous solution. Al3+ and F- could be recognized by fluorescence enhancement of 1 and their limits of detection (0.19 μM for Al3+ and 1.9 μM for F-) were remarkably low compared to WHO guidelines (7.4 μM for Al3+ and 79 μM for F-) in drinking water. Also, sensor 1 was applied to quantify Al3+ and F- in real water samples and to image Al3+ in living cells. Interestingly, the resulting 1-Al3+ complex could be used to discriminate pyrophosphate (PPi) over competing anions including phosphate-based anions, by the fluorescence decrease. Based on photophysical studies and theoretical calculations, the sensing mechanisms of 1 toward Al3+, PPi and F- were explained.

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Publication details

The article was received on 19 Sep 2017, accepted on 11 Nov 2017 and first published on 13 Nov 2017


Article type: Paper
DOI: 10.1039/C7NJ03575F
Citation: New J. Chem., 2017, Accepted Manuscript
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    A single fluorescent chemosensor for multiple targets: the sequential detection of Al3+ and pyrophosphate and the selective detection of F- in a near-perfect aqueous solution

    C. Kim, S. Hwang, M. Kim, M. Lee and M. H. Lim, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ03575F

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