A Naphthalimide-Based Fluorescence "Off-on-Off" Chemosensor for Relay Detection of Al and ClO.

A novel Al chemosensor was designed and synthesized on basis of the mechanism of ICT and CHEF. Upon addition of Al, the probe displayed a bright green fluorescence under UV radiation and visual color change from yellow to colorless. Spectrum titrations showed that could be recognized as a fluorescent turn-on probe with 10 M detection level. The probe was successfully applied in real water sample and test paper. More important, -Al complex were used as a fluorescent turn-off probe for the detection of ClO with the detection as low as 2.34 × 10 M. The performance of to Al and -Al complex to ClO demonstrated that could be served as a sensitive probe and exhibit INHIBIT logic gate behavior with Al and ClO as inputs.