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An Optical Probe Possessing Upconversion Luminescence and Hg2+-Sensing Properties

Authors

  • Dr. Jin Zhang,

    1. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 3888 Eastern South Lake Road, Changchun 130033 (P. R. China), Fax: (+86) 431 86176935
    2. University of Chinese Academy of Sciences, Beijing 100039/(P. R. China)
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  • Prof. Bin Li,

    Corresponding author
    1. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 3888 Eastern South Lake Road, Changchun 130033 (P. R. China), Fax: (+86) 431 86176935
    2. Key Laboratory of Polyoxometalate, Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024 (P. R. China)
    • State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 3888 Eastern South Lake Road, Changchun 130033 (P. R. China), Fax: (+86) 431 86176935

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  • Dr. Liming Zhang,

    1. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 3888 Eastern South Lake Road, Changchun 130033 (P. R. China), Fax: (+86) 431 86176935
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  • Dr. Ligong Zhang

    1. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 3888 Eastern South Lake Road, Changchun 130033 (P. R. China), Fax: (+86) 431 86176935
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Abstract

A Hg2+-selective chromophoric upconversion nanosystem is achieved by covalently grafting Rhodamine B hydrazide (RB-hydrazide) onto upconversion luminescent nanorod core–shell structures. The prepared β-NaYF4 nanorods are coated with silica and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDAX), Fourier-transform infrared spectroscopy (FTIR), and photoluminescence spectra. Under 980 nm excitation, the upconversion luminescence is sensitive towards Hg2+ because RB-hydrazide-Hg can efficiently absorb green upconversion emission. The prepared nanocomposites exhibit high sensitivity and selectivity towards Hg2+ over other metal ions. These results indicate that this nanosystem could be developed as a promising fluorescence probe for detecting Hg2+ ions.

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