Abstract
A new Hg2+-selective chemosensor based on dithiosquarylium (DTSQ) dye was investigated. Among various metal cations tested, exclusively Hg2+ ion responses to irreversible color change of DTSQ-1, along with the Hg2+-triggered desulfurization of dithiosquarylium into its oxygen analogue squarylium (SQ) dye.
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