Abstract
A novel reaction-based probe for fluorescence signaling of Hg 2+ ions was developed. Selective Hg 2+ -induced cleavage of a dithioacetal resulting in switching from pyrene excimer to monomer emission was used for the signaling. Changes in excimer and monomer emissions of pyrene were readily employed for ratiometric signaling of Hg 2+ ions in aqueous acetonitrile. Selective signaling of Hg 2+ ions over other common metal ions was observed with a detection limit of 9.8 × 10 −7 M.
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