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  • Title: Histidine based fluorescence sensor detects Hg2+ in solution, paper strips, and in cells.
    Author: Hatai J, Pal S, Jose GP, Bandyopadhyay S.
    Journal: Inorg Chem; 2012 Oct 01; 51(19):10129-35. PubMed ID: 22978648.
    Abstract:
    A chemosensor having a bipodal thiocarbamate scaffold attached to histidine moieties senses Hg(2+) with a remarkable selectivity. The binding results in a 50 nm blue shift in the fluorescence spectra and a 19-fold enhancement of the fluorescence quantum yield of the ligand. In addition to the detection of Hg(2+) visually under UV light in solution, the chemosensor was used for fabrication of paper strips that detected Hg(2+) in aqueous samples. The sensor was also used for imaging Hg(2+) in adult zebrafish and in human epithelial carcinoma HeLa S3 cells.
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