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Surface Molecular Imprinting on Silica-Coated CdTe Quantum Dots for Selective and Sensitive Fluorescence Detection of p-aminophenol in Water

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Abstract

In this paper, a selective and sensitive sensor for the determination of p-aminophenol (PAP) was developed by grafting molecularly imprinted polymers (MIPs) on the surface of silica-coated CdTe quantum dots (CdTe@SiO2@MIPs). The obtained CdTe@SiO2@MIPs were characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy and fluorescence spectroscopy. The fluorescence intensity of CdTe@SiO2@MIPs was more strongly quenched by PAP than that of the structural analogues of PAP. Under the optimal conditions, the fluorescence intensity of the CdTe@SiO2@MIPs decreased sensitively with the increase of PAP concentration in the range of 0.05–50 μM. The limit of detection was 0.02 μM (3σ/K sv). The sensor was successfully used to determine PAP in tap and lake water samples, and the average recoveries of PAP at various spiking levels ranged from 97.33 % to 103.3 % with relative standard deviations below 20 %.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (No. 81171937).

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Authors and Affiliations

  1. School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China

    Xialin Lu, Fangdi Wei, Guanhong Xu, Yanzi Wu, Jing Yang & Qin Hu

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  1. Xialin Lu
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  2. Fangdi Wei
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  3. Guanhong Xu
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  4. Yanzi Wu
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  5. Jing Yang
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  6. Qin Hu
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Correspondence to Qin Hu.

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Xianlin Lu and Fangdi Wei contributed equally to this work.

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Lu, X., Wei, F., Xu, G. et al. Surface Molecular Imprinting on Silica-Coated CdTe Quantum Dots for Selective and Sensitive Fluorescence Detection of p-aminophenol in Water. J Fluoresc 27, 181–189 (2017). https://doi.org/10.1007/s10895-016-1944-7

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  • DOI: https://doi.org/10.1007/s10895-016-1944-7

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