Abstract
A novel red-emitting chemosensor BCTT has been developed for the detection of Hg2+ and CN− in DMF-water solution with high sensitivity and selectivity. It exhibited a ‘turn-on’ fluorescence upon binding with Hg2+ based on its AIE properties and a ‘turn-off’ response to CN− due to the nucleophilic addition of CN− to the dicyanovinyl group with visible color changing from yellow to colorless. Remarkably, the detection limits for Hg2+ and CN− were 6.6 nM and 0.11 μM, respectively, which are much lower than the regulated limits in drinking water, promoting BCTT as a promising candidate in practical applications.
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