Abstract
AbstractA new thioimide‐based fluorescent ‘turn‐on’ and chromogenic chemodosimeter for highly selective and sensitive detection of Hg2+ has been developed. The chemodosimeter showed not only marked color change of the solution from dark green to colorless upon the addition of Hg2+ ion, but also 100‐fold enhancement of the fluorescent intensity in aqueous acetonitrile. The detection mechanism resulted from the Hg2+ induced desulfurization of the thioimide to its imide precursor. When the chemodosimeter was assembled into nanoparticles, it could also exhibit remarkably dual response of color change, fluorescence enhancement, and highly selective and sensitive detection of Hg2+.
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