Frontiers in Chemistry (Feb 2020)

A Fluorescent and Colorimetric Chemosensor for Hg2+ Based on Rhodamine 6G With a Two-Step Reaction Mechanism

  • Cui-Bing Bai,
  • Cui-Bing Bai,
  • Wei-Gang Wang,
  • Jie Zhang,
  • Chang Wang,
  • Chang Wang,
  • Rui Qiao,
  • Rui Qiao,
  • Biao Wei,
  • Biao Wei,
  • Lin Zhang,
  • Lin Zhang,
  • Shui-Sheng Chen,
  • Shui-Sheng Chen,
  • Song Yang,
  • Song Yang

DOI
https://doi.org/10.3389/fchem.2020.00014
Journal volume & issue
Vol. 8

Abstract

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A fluorescent and colorimetric chemosensor L based on rhodamine 6G was designed, synthesized, and characterized. Based on a two-step reaction, the chemosensor L effectively recognized Hg2+. The interaction between the chemosensor and Hg2+ was confirmed by ultraviolet–visible spectrophotometry, fluorescence spectroscopy, electrospray ionization–mass spectrometry, Fourier-transform infrared spectroscopy, and frontier molecular orbital calculations. The chemosensor L was also incorporated into test strips and silica gel plates, which demonstrated good selectivity and high sensitivity for Hg2+.

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