Abstract
A novel 1,3-diazepine based fluorescent probe for Hg2+ has been successfully synthesized and characterized. Comprising a furan and pyridine, the probe L1 is a blue-emitting 1,3-diazepine derivative, which transforms into an imine form with high fluorescent yellow-emitting under alkaline conditions. Fluorescence quench of the probe in ethanol was observed with the addition of Hg2+ aqueous in the presence and absence of other metal ions, with a visible color change from colorless to yellow, and this fluorescence quench can be observed in a wide pH range of 3–11. An important feature for this probe is its high selectivity towards mercury ions for the aqueous-phase detection of Hg2+ over the other competitive metal ions, making the “naked-eye” detection of mercury ions possible.
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