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Dual-emission ratiometric fluorescence detection of aspirin in human saliva: onsite naked-eye detection and high stability

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Abstract

In this paper, a highly stable ratiometric fluorescence probe based on dual-emission quantum dots (QDs) was designed for the visual detection of aspirin. The probe was composed of two differently colored CdTe QDs, in which red-emitting QDs embedded in SiO2 (r-QDs@SiO2) acted as the reference signal and green-emitting QDs (g-QDs) covalently anchored on the surface of r-QDs@SiO2 served as the response signal. The fluorescence of r-QDs@SiO2 remained constant, whereas the fluorescence of g-QDs was quenched by the addition of aspirin. As a result, continuous color changes in the dual-emission fluorescence probe were observed. Under optimum conditions, the as-prepared dual-emission fluorescence probe was used for the determination of aspirin in a concentration range of 6.0–45 μmol L−1 with a detection limit of 0.20 μmol L−1. Furthermore, the present method was successfully applied in the detection of aspirin in real samples with a relatively high stability for about ten days.

Graphical abstract: Dual-emission ratiometric fluorescence detection of aspirin in human saliva: onsite naked-eye detection and high stability

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Publication details

The article was received on 14 Aug 2017, accepted on 19 Oct 2017 and first published on 19 Oct 2017


Article type: Paper
DOI: 10.1039/C7NJ03015K
Citation: New J. Chem., 2017, Advance Article
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    Dual-emission ratiometric fluorescence detection of aspirin in human saliva: onsite naked-eye detection and high stability

    L. Chen, L. Sun, J. Zheng, J. Dai, Y. Wu, X. Dai, C. Li and Y. Yan, New J. Chem., 2017, Advance Article , DOI: 10.1039/C7NJ03015K

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