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The Schiff bases (E)-3-{[(2-amino-5-nitrophenyl)imino]methyl}phenol and (E)-3-{[(2-amino-5-nitrophenyl)imino]methyl}benzene-1,2-diol were synthesised from 2,3-dihydroxy-benzaldehyde, salicylaldehyde and 4-nitro-o-phenylenediamine. These ligands were characterised by Fourier transform infrared (FTIR), UV-Visible, CHN analysis, and HNMR. Ni(II) and Cu(ІІ) cation-exchange montmorillonite (MMT) clay was prepared by the interactions of NiCl2, CuCl2 and MMT clay in an aqueous medium. FTIR and EDX were used to characterise the metal cation-exchange in MMT. Schiff base Cu(II) and Ni(ІІ) complexes intercalated montmorillonite were prepared by the interaction of Schiff base ligands and Cu(II) and Ni(ІІ) cation-exchange MMT. Several characterisation techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA) were used to characterise the modified MMT. SEM results showed that the resulting hybrid had layered structures. The XRD results indicate that the Nickel(II) Schiff base complex-MMT was partially exfoliated.

Intercalation of Schiff Base Ligands with Copper (ІІ) and Nickel (ІІ) Cation-exchange Montmorillonite (MMT) Nanoclay