Abstract
A new fluorescent chemodosimeter based on tetrahydro[5]helicene imide was synthesized, and it showed high selectivity and sensitivity toward Hg2+ ions over other different tested metal ions in water. The response time was within 0.5 min, and the detection limit of the chemodosimeter for Hg2+ was estimated to be 2.0 × 10−8 mol•L−1. The Hg2+ promoted deprotection of dithioacetal groups of 1, which induced water‐soluble fluorescent chemodosimeter 1 to form a water‐insoluble aldehyde precursor.
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