Two Novel Salen Based Chemosensors for Selective Recognition of Zinc(II) Ion

摘要

Two novel salen based chemosensors were synthesized and identified by FT-IR, 1H-NMR andElemental analysis. We evaluated the selectivity and sensitivity of probe L1 and L2 toward zinc ionsvia UV-vis, Cyclic voltammetry and 1H-NMR measurement. The finding suggested the selective andsensitive recognition toward zinc ions was more typical than the other metal ions. The Zn2+ can bedetected well even the concentration of the probes are low to 10 μM. The stoichiometries of thecomplexs formed between the probes and Zn2+ are 1:1, as determined by Job’s method. And theseprobes showed distinctly different CV curves with Zn2+. 1H-NMR research showed that the hydrogensin N=CH- and OH- are evidently up-field shift. These changes are due to the transform of N2O2coordination plane of Schiff bases.