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  • Title: Highly sensitive and selective chemosensor for Hg2+ based on the rhodamine fluorophore.
    Author: Lee MH, Wu JS, Lee JW, Jung JH, Kim JS.
    Journal: Org Lett; 2007 Jun 21; 9(13):2501-4. PubMed ID: 17530763.
    Abstract:
    A novel tren-based tripodal chemosensor 1 bearing a rhodamine and two tosyl groups was synthesized and its sensing behavior toward metal ions was investigated by UV/vis and fluorescence spectroscopies. Addition of a Hg2+ ion to a CH3CN solution of 1 gave a visual color change as well as significantly enhanced fluorescence, while other ions including Pb2+, Zn2+, Cu2+, Ca2+, Ba2+, Cd2+, Co2+, Mg2+, Ag+, Cs+, Li+, and Na+ induced no or much smaller color/spectral changes, which constituted a Hg2+-selective fluorescent chemosensor (OFF-ON).
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