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A new Schiff base fluorescent indicator for the detection of Mg2+ and its application to real samples

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Abstract

A new Schiff base fluorescence probe, 3-Allylsalicylaldehyde salicylhydrazone (L), for Mg2+ was designed and synthesized. The fluorescence of the sensor L was enhanced remarkably by Mg2+ with 2:1 binding ratio, and the binding constant was determined to be 1.02 × 107 M−1. Probe L had high sensitivity for Mg2+ in a solution of DMF/water (4:1, v/v, pH 7.5), and the detection limit was 4.88 × 10−8 mol/L. Common coexistent metal ions, such as K+, Na+, Ag+, Ca2+, Zn2+, Ba2+, Bi2+, Cu2+, Ni2+, Hg2+, Fe3+ , and Al3+, showed little or no interference on the detection of Mg2+ in solution. The fluorescence probe L, which was successfully used for the determination of trace Mg(II) in real samples, was shown to be promising for liquid-phase extraction coupled with fluorescence spectra.

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Acknowledgments

This work was financially supported by National Natural Science Foundation of China (No. 11175080), Science Foundation of Hunan Province Department of Education (No. 12A117), Hunan Provincial Innovation Foundation for Postgraduate (Nos. CX2015B399 and CX2015B400).

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Correspondence to Hongqing Wang.

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Zhang, Q., Wang, H., Wang, Y. et al. A new Schiff base fluorescent indicator for the detection of Mg2+ and its application to real samples. Res Chem Intermed 42, 6681–6693 (2016). https://doi.org/10.1007/s11164-016-2489-8

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  • DOI: https://doi.org/10.1007/s11164-016-2489-8

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