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Novel highly selective fluorescent chemosensors for Hg(II)

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Chemical Research in Chinese Universities Aims and scope

Abstract

Based on Rhodamine, two novel fluorescent Hg2+ chemosensors(R1, R2) were synthesized from inexpensive starting materials. They were designed and synthesized with o-aminophenol and o-phenylenediamine derivatives as the Hg2+ chelator, the comparison between the photophysical properties of two chemosensor molecules was made. The chemosensors were designed with a photoinduced electron transfer(PET) mechanism. After binding to Hg2+ which blocks the PET process, the fluorescence intensity of the chemosensors was enhanced by up to 15-fold. They exhibit very strong fluorescence responses to Hg2+ and have remarkably higher selectivity for Hg2+ than for other metal ions including K+, Na+, Ca2+, Mg2+, Cd2+, Mn2+, Ni2+, Co2+, Zn2+, Cu2+, Cr3+, Fe3+, Pb2+, Ag+, Al3+, Fe2+ and Sn2+ in Tris-HCl/sodium phosphate buffer. The fluorescence enhancement of R2 towards Hg2+ maintains stable in wide pH span(6.4–8.8) aqueous solutions.

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Authors and Affiliations

  1. Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, Ministry of Education, Department of Chemistry, Northwest University, **’an, 710069, P. R. China

    Wen-qi Su & Bing-qin Yang

Authors
  1. Wen-qi Su
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  2. Bing-qin Yang
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Corresponding author

Correspondence to Bing-qin Yang.

Additional information

Supported by the National Natural Science Foundation of China(No.21172178).

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Su, Wq., Yang, Bq. Novel highly selective fluorescent chemosensors for Hg(II). Chem. Res. Chin. Univ. 29, 657–662 (2013). https://doi.org/10.1007/s40242-013-2363-9

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  • DOI: https://doi.org/10.1007/s40242-013-2363-9

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