The salen based chemosensors for highly selective recognition of Zn 2+ ion

摘要

Two novel salen based chemosensors have been successfully synthesized. UV–vis absorption, fluorescence emission spectroscopy and cyclic voltammetry (CV) were exploited to investigate their recognition toward various metal ions, including Na+, K+, Mg2+, Al3+, Zn2+, Ag+, Pb2+, Co2+, Li+, Ba2+, Ca2+, Cd2+, La3+, Cu2+and Mn2+ions. The results indicated that the sensor L1 and L2 exhibited highly selective and sensitive recognition for Zn2+ions. The binding stoichiometry ratio of L1-Zn2+/L2-Zn2+were recognized as 4:1 by the method of Job's plot. Meanwhile, this investigation is confirmed by1H NMR. These results indicated that L1 and L2 can be applied as chemosensor for the detection of Zn2+ion.