Abstract
Herein we developed a cascade detection mode for the detection of HS− and ClO− by the novel probe NM-Cl bearing a conjugating naphthalene-dicyanoisophorone unit. The probe displayed sensitive and remarkable fluorescent enhancement in response to HS−, but not to other analytes. The mixture of probe and HS− constructed a specific sensing system for ClO− by fluorescent quenching response. The mechanism studies indicated that the successive reacting of HS− substitution Cl atom in probe and then addition of ClO− facilitation a thiofuran ring-forming induced differentiated fluorescence emission. This study provides a novel mechanism for the detection of HS− and ClO−, the imaging of cell and living animal further indicating the good application prospects of the probe in biosensing and bioimaging.
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