Abstract
Herein we report a naphthalimide-chromophore based blue light emitting Aggregation-Induced Emission (AIE) active fluorescent chemo-sensor for the selective turn-on fluorescent sensing of HSO4−/SO42− ions in the aqueous medium through in-depth spectroscopic and microscopic analysis. HSO4−/SO42−sensing in aqueous environment is quite challenging due to its high hydration energy, however Nap-1 showed a detection limit down to the micromolar range without any interference from the other tested competitive anions. The sensing mechanism has been discussed thoroughly. Nap-1 was further applied in detection of HSO4−/SO42− ions in real water as well as in fabrication of an economical paper strip model. The receptor-anion ensemble was further used for the sensing of heavy metal ions such as Pb2+ in the micromolar range. Nap-1 was used for the construction of two inputs INHIBIT type molecular logic gate.
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