One-pot synthesis of copper nanoconjugate materials as luminescent sensor for Fe3+ and I? detection in human urine sample

摘要

A simple synthetic approach of water-soluble and stable fluorescent copper nanoclusters (Cu NCs) at room temperature was proposed. The cysteamine functionalized nanoconjugate materials ( CA-Cu NCs ) exhibited variety of exceptional properties, including good water-solubility, photostability, low cytotoxicity and acting as an excellent cell imaging probe. Based on the electron transfer and aggregation induced fluorescence quenching mechanism, CA-Cu NCs were utilized in the selective determination of ferric (Fesup3+/sup) and iodide (Isup?/sup) ions. The detection limits of Fesup3+/sup and Isup?/sup ions were calculated as 423?nM and 2.02?μM, which are lower than the maximum level of Fesup3+/sup and Isup?/sup ions, allowed in drinking water by the U.S. Environmental Protection Agency. The assay method of paper strip was also successfully applied for the detection of Fesup3+/sup and Isup?/sup ions in live cells and human urine.