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Fluorescence and colorimetric sensor with simplistic synthesis method based on 1-imidazolylmethylpyrene (IMPY) was found to be a specific recognition for an explosive chemical: 2,4,6-trinitrophenol or picric acid (PA). The sensor did not only provide highly sensitive OFF–ON fluorescence enhancement toward PA in acetonitrile, but also offered ON–OFF fluorescence quenching upon PA binding in toluene...
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