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Rhodamine 6G-based chemosensor for the visual detection of Cu2+ and fluorescent detection of Hg2+ in water

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Abstract

A novel water soluble chemosensor 1 based on rhodamine 6G spirolactam scaffold has been synthesized and characterized. Upon addition of a wide range of the environmentally and biologically relevant metal ions, chemosensor 1 shows a colorimetric selective Cu2+ recognition from colorless to pink confirmed by UV-Vis absorption spectral changes, while it also exhibits a fluorometric selective Hg2+ recognition by fluorescence spectrometry. An absorption enhancement factor over 17-fold with 1-Cu2+ complex and a fluorescent enhancement factor over 45-fold with 1-Hg2+ complex were observed. Their recognition mechanisms were assumed to be a 1:1 stoichiometry for 1-Cu2+ complex and a 1:2 stoichiometry for 1-Hg2+ complex, respectively, which were proposed to be different ligation leading to the ring-opening of rhodamine 6G spirolactam. Furthermore, the detection limits for Cu2+ or Hg2+ were 3.3×10−8 or 1.7×10−7 mol/L, respectively.

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Authors and Affiliations

  1. Key Laboratory of Display Materials & Photoelectric Devices, Ministry of Education, School of Materials Science & Engineering, Tianjin University of Technology, Tianjin, 300384, P. R. China

    Song He, Qiuchen Liu, Yuanyuan Li, Fangfang Wei, Songtao Cai, Yan Lu & Xianshun Zeng

Authors
  1. Song He
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  2. Qiuchen Liu
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  3. Yuanyuan Li
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  4. Fangfang Wei
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  5. Songtao Cai
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  6. Yan Lu
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  7. Xianshun Zeng
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Corresponding author

Correspondence to Xianshun Zeng.

Additional information

Supported by the National Natural Science Foundation of China(Nos.21272172, 21074093, 21004044) and the Natural Science Foundation of Tianjin City, China(No.12JCZDJC21000).

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He, S., Liu, Q., Li, Y. et al. Rhodamine 6G-based chemosensor for the visual detection of Cu2+ and fluorescent detection of Hg2+ in water. Chem. Res. Chin. Univ. 30, 32–36 (2014). https://doi.org/10.1007/s40242-014-3364-z

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  • DOI: https://doi.org/10.1007/s40242-014-3364-z

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