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

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

JOURNAL=Frontiers in Chemistry

VOLUME=8

YEAR=2020

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2020.00014

DOI=10.3389/fchem.2020.00014

ISSN=2296-2646

ABSTRACT=<p>A fluorescent and colorimetric chemosensor <bold>L</bold> based on rhodamine 6G was designed, synthesized, and characterized. Based on a two-step reaction, the chemosensor <bold>L</bold> effectively recognized Hg<sup>2+</sup>. The interaction between the chemosensor and Hg<sup>2+</sup> was confirmed by ultraviolet–visible spectrophotometry, fluorescence spectroscopy, electrospray ionization–mass spectrometry, Fourier-transform infrared spectroscopy, and frontier molecular orbital calculations. The chemosensor <bold>L</bold> was also incorporated into test strips and silica gel plates, which demonstrated good selectivity and high sensitivity for Hg<sup>2+</sup>.</p>