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.
Research on Chemical Intermediates – Springer Journals
Published: Mar 3, 2016
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