Abstract
A new rhodamine-derived Schiff base ( RS) was synthesized and its sensing property to metal ions was investigated by UV/vis and fluorescence spectroscopies. Addition of Hg 2+ ions to the aqueous solution of RS gave a visual color change as well as significantly fluorescent enhancement, while other ions including Pb 2+, Cd 2+, Cr 3+, Zn 2+, Cu 2+, Fe 2+, Co 3+, Ni 2+, Ca 2+, Mg 2+, K + and Na + ions did not induce any distinct color/spectral changes, which constituted a Hg 2+-selective fluorescent OFF– ON chemosensor. The Hg 2+-induced ring-opening of spirolactam of rhodamine in RS resulted in the dual chromo- and fluorogenic observation.
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Schedule a callMore From: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
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