Rhodamine-derived Schiff base for the selective determination of mercuric ions in water media |
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| Authors: | Quang Duong Tuan Wu Jia-Sheng Luyen Nguyen Dinh Duong Tran Dan Nguyen Dang Bao Nguyen Chi Quy Phan Tu |
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| Institution: | Department of Chemistry, Hue University, Hue 8454, Viet Nam. duongtuanquang@dhsphue.edu.vn |
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| 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 Hg2+ ions to the aqueous solution of RS gave a visual color change as well as significantly fluorescent enhancement, while other ions including Pb2+, Cd2+, Cr3+, Zn2+, Cu2+, Fe2+, Co3+, Ni2+, Ca2+, Mg2+, K+ and Na+ ions did not induce any distinct color/spectral changes, which constituted a Hg2+-selective fluorescent OFF-ON chemosensor. The Hg2+-induced ring-opening of spirolactam of rhodamine in RS resulted in the dual chromo- and fluorogenic observation. |
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