RSC Advances p. 41905 - 41913 (2015)
Update date:2022-08-17
Topics:
Lee, Jae Jun
Lee, Seul Ah
Kim, Hyun
Nguyen, Letuyen
Noh, Insup
Kim, Cheal
A new simple quinolone-based chemosensor 1 was synthesized for Zn2+. 1 exhibited selective fluorescence enhancement in the presence of Zn2+ with a 1:1 stoichiometry in aqueous solution, which was reversible with the addition of ethylenediaminetetraacetic acid (EDTA). The detection limit (0.019 μM) of 1 for Zn2+ is far lower than the World Health Organization guideline (76 μM) in drinking water. 1 was successfully applied to quantify and image Zn2+ in water samples and living cells. The sensing mechanism of Zn2+ by 1via the chelation-enhanced fluorescence (CHEF) effect was supported by theoretical calculations. Therefore, 1 could be used in a practical system for monitoring Zn2+ in aqueous solution.
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