Intercalation and Complexation of Ni (II) by Schiff Base Ligands Incorporated into Mg-Al Layered Double Hydroxides

Abstract

A novel complexes Ni(II) Schiff base N, N' -bis(salicylidene)-3,4-diaminobenzoic, denoted (Ni (LH)) has been synthesised and characterised by UV, IR and XRD then Mg-Al layered double hydroxides (LDH) intercalated by Ni (LH) complex were prepared by co-precipitation and reconstruction of a mixed oxide catalyst (Mg-AlC).The characteristics of the modified LDH -Ni(LH) were characterized by X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FT-IR), thermal gravimetric (TGA) and BET surface area . The IR spectral study of Ni(LH) complex showed that the metal ion coordinate through the two nitrogen atoms of the azomethine group and the two oxygen atoms of the deprotonated hydroxyl group of the salicyaldehyde moiety, in addition  the IR spectral study of modified LDH -Ni(LH) indicated that most of the interlayer carbonate anions were replaced by Ni(LH) anions to form LDH-Ni(LH) and we see the rebuilding of the LDH phase after intercalation.