A novel long-wavelength turn-on fluorescent chemosensor based on pyrene was synthesized to detect Hg. In the presence of other metal ions, could effectively recognize Hg and produce the turn-on fluorescent emission at 607 nm. Also, the absorption spectrum exhibited red-shift. Meanwhile, the change of the solution color from yellow to orange was directly observed by the naked eye. The interaction between and Hg was confirmed by the Job's plot, electrospray ionization mass spectrometry, scanning electron microscopy, and density functional theory calculations. It was found that the fluorescence of could be reversible when I was added into the solution of and Hg. illustrated high selectivity and good sensitivity for Hg with the limit of detection of 36 nm. Moreover, could be utilized as test strips and silica gel plates to identify Hg.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6740181 | PMC |
http://dx.doi.org/10.1021/acsomega.9b02078 | DOI Listing |
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