Synthesis, characterization and crystal structure of a new fluorescent probe based on Schiff Base for the detection of Zinc (II)

A Schiff base compound (L) was synthesized using o-vanillin and 4, 4′-diaminodiphenylmethane and characterized by elemental analysis, 1H NMR, 13C NMR, IR, electronic absorption spectra and X-ray diffraction single crystal analysis. The title compound(L) has no fluorescence intensity in a range of 450–650 nm, but its fluorescence spectrum shows enhancement in the intensity of the signal at 372 nm on binding with the Zn(II) cation from pH = 6 to 14. No such significant change was observed for other metal ions. Fluorescence intensity was linear with concentration of Zn (II) cation in a range from 1 × 10− 7 mol·L− 1 to 1.2 × 10− 5 mol·L− 1. This Schiff base compound is a promising system for the development of new fluorescent probes for the detection of Zn (II) cation.

A Schiff base was synthesized and characterized and determined by elemental analysis, 1H NMR, 13C NMR, IR, electronic absorption spectra and X-ray diffraction single crystal analysis. It was found that this Schiff base compound is promising system for the development of new fluorescent probes for the detection of Zn (II) cation.Figure optionsDownload as PowerPoint slideResearch highlights
► This Schiff base can be used as a new fluorescent probes for the detection of Zn (II) cation.
► The crystal structures and molecular structure of Schiff base ligand was determined by single-crystal X-ray diffraction.
► This Schiff base compound is promising system for the development of new fluorescent probes for the detection of Zn (II) cation.