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Description
Fluorescent-based sensors have received extensive attention due to its highly sensitive and rapid sensing ability to detect metal ions. In this study, we have developed a new BODIPY derivative, mTBODdiSalic for detection of metal ions in aqueous media. The probe has been synthesized from 2,4-dimethylpyrrole and 5-formylsalicylic acid in 4 steps and fully characterized with NMR and Mass spectrometry. mTBODdiSalic displays a maximum absorption and emission at wavelength 642 and 662 nm which appear as blue color in daylight and pink under fluorescent black light, respectively. Among 19 various metal ions, mTBODdiSalic's emission was selectively quenched by the addition of Cu$^{2+}$ and Al$^{3+}$ ions. Moreover, mTBODdiSalic could react with Au$^{3+}$ to afford maximum absorption wavelength shift from 642 into 573 nm (purple color) along with maximum emission wavelength shift from 662 into 596 nm (orange fluorescence). Therefore, mTBODdiSalic could be used to visually discriminate between Au$^{3+}$ over other cations in aqueous solution under a UV−vis lamp.
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