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  • Title: Cysteamine-capped copper nanoclusters as a highly selective turn-on fluorescent assay for the detection of aluminum ions.
    Author: Boonmee C, Promarak V, Tuntulani T, Ngeontae W.
    Journal: Talanta; 2018 Feb 01; 178():796-804. PubMed ID: 29136897.
    Abstract:
    A new type of copper nanoclusters was synthesized by a one-pot reaction using cysteamine as a capping agent and reducing agent (Cys-CuNCs). The synthesized CuNCs exhibited a spherical shape and a monodisperse and strong fluorescent emission characteristic peak at 430nm when exciting at 330nm. The Cys-CuNCs were demonstrated as a fluorescent chemodosimeter for the selective detection of Al3+. In the presence of Al3+, the fluorescent emission of the Cys-CuNCs was considerably enhanced, while other studied metal ions did not show this phenomenon. The fluorescent intensity near 380nm linearly increased with an increasing Al3+ concentration. The proposed method provided a working range of 1-7µM with a low detection limit of 26.7nM and was applied to determine Al3+ in drinking water samples with satisfactory results.
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