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Dual-Emitting N/S-Doped Carbon Dots-Based Ratiometric Fluorescent and Light Scattering Sensor for High Precision Detection of Fe(III) Ions

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Abstract

Precise and rapid sensing of Fe(III) under concerned facile conditions is important in environmental monitoring. Herein, a facile and label-free ratiometric sensor is constructed for selective determination of Fe(III) ions by coupling second-order scattering (SOS) and fluorescence. We were synthesized fluorescent N, S-doped carbon dots (N/S-CDs) via facile one-step hydrothermal treatment with an intensive fluorescence and a weak SOS signal and high quantum yield (32%). The fluorescence of N/S-CDs was quenched whereas the intensity of SOS was relatively increased by Fe(III) ions due to aggregation-induced fluorescence quenching or enhancement. Based on this effect, a novel fluorescent ratiometric probe with the combined fluorescence and SOS is proposed for the sensing of Fe(III) ions, and with the detection limit of 83 nM and linear range of 0.1–10 μM and 10–40 μM, respectively.

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Authors and Affiliations

  1. Technology Centre of China Tobacco Guangxi Industrial Co., LTD, Nanning, 530001, Guangxi Province, China

    Zhiyan Chen, Xueqin Xu, Dongling Meng, Honglin Jiang, Yun Zhou & Shouai Feng

  2. Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan Province, China

    Zhao Mu & Yaling Yang

Authors
  1. Zhiyan Chen
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  2. Xueqin Xu
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  3. Dongling Meng
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  4. Honglin Jiang
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  5. Yun Zhou
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  6. Shouai Feng
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  7. Zhao Mu
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  8. Yaling Yang
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Correspondence to Yaling Yang.

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Chen, Z., Xu, X., Meng, D. et al. Dual-Emitting N/S-Doped Carbon Dots-Based Ratiometric Fluorescent and Light Scattering Sensor for High Precision Detection of Fe(III) Ions. J Fluoresc 30, 1007–1013 (2020). https://doi.org/10.1007/s10895-020-02571-6

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  • DOI: https://doi.org/10.1007/s10895-020-02571-6

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