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  • Title: A novel terephthalaldehyde based turn-on fluorescent chemosensor for Cu2+ and its application in imaging of living cells.
    Author: Torawane P, Keshav K, Kumawat MK, Srivastava R, Anand T, Sahoo S, Borse A, Kuwar A.
    Journal: Photochem Photobiol Sci; 2017 Sep 13; 16(9):1464-1470. PubMed ID: 28799606.
    Abstract:
    A new terephthaldehyde-based chemosensor 1 bearing an aminophenol recognition unit has been synthesized and applied to the fluorescent sensing of metal ions. Molecular system 1 acts as a highly selective and sensitive fluorescence turn-on sensor for Cu2+. The sensing mechanism has been explored. It is proposed that Cu2+ binds with the imine and hydroxyl moiety of 1 in 1 : 2 binding stoichiometry, thereby enhancing the fluorescence at 386 nm. The detection limit and association constant (Ka) of 1 with Cu2+ were found to be 0.62 μM and 6.67 × 104 M-1, respectively. Chemosensor 1 has shown excellent specificity towards Cu2+ and has been successfully applied to the determination of Cu2+ in live L929 cells.
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