We present a reaction-based fluorescent probe (1) for Hg and CHHg, based on the displacement reaction of the arylboronic acid with the mercury species. 1 showed promising sensing properties for Hg and CHHg, such as high selectivity and sensitivity, turn-on response, fast response to Hg (<2 min) and CHHg (<5 min), low detection limits and operation in purely aqueous solutions.
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