Novel nanohybrids of cobalt(III) Schiff base complexes and clay: Synthesis and structural determinations

The [Co(Me(2)Salen)(PBu3)(OH2)]BF4 and [co(me(2)salen)(PPh3)(Solv)[BF4, complexes were synthesized and characterized by FT-IR, UV-Vis, H-1 NMR spectroscopy and elemental analysis techniques. The coordination geometry of [Co(Me-2-Salen)(PPh3)(F120)P3F4 was determined by X-ray crystallography. It has been found that the complex is containing [Co(Me2Salen)(PPh3)(H20)113F4 and [Co(Me2Salen)(PPh3)(EtOKBP4 hexacoordinate species in the solid state. Cobalt atom exhibits a distorted octahedral geometry and the Me2Salen ligand has the N202 coordinated environment in the equatorial plane. The [Co(Me2Salen) (PPh3)(H20)113F4 complex shows a dimeric structure via hydrogen bonding between the phenolate oxygen and hydrogens of coordinated H2O molecule. These complexes were incorporated into MontmorilloniteK10 nanoclay. The modified clays were identified by FT-IR, XRD, EDX, TGA/DTA, SEM and TEM techniques. According to the XRD results of the new nanohybrid materials, the Schiff base complexes are intercalated in the interlayer spaces of the clay. SEM and TEM micrographs show that the resulting hybrid nanomaterials have layer structures. Also, TGA/DTG results show that the intercalation reaction was taken place successfully. @ 2014 Published by Elsevier B.V.