title: Novel nanohybrids of cobalt(III) Schiff base complexes and clay: synthesis and structural determinations.
abstract: The [Co(Me(2)Salen)(PBu(3))(OH(2))]BF4 and [Co(Me(2)Salen)(PPh(3))(Solv)]BF(4), complexes were synthesized and characterized by FT-IR, UV-Vis, (1)H NMR spectroscopy and elemental analysis techniques. The coordination geometry of [Co(Me(2)Salen)(PPh(3))(H(2)O)]BF(4) was determined by X-ray crystallography. It has been found that the complex is containing [Co(Me(2)Salen)(PPh(3))(H(2)O)]BF(4) and [Co(Me(2)Salen)(PPh(3))(EtOH)]BF(4) hexacoordinate species in the solid state. Cobalt atom exhibits a distorted octahedral geometry and the Me(2)Salen ligand has the N2O2 coordinated environment in the equatorial plane. The [Co(Me(2)Salen)(PPh(3))(H(2)O)]BF(4) complex shows a dimeric structure via hydrogen bonding between the phenolate oxygen and hydrogens of coordinated H2O molecule. These complexes were incorporated into Montmorillonite-K10 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.
authors.affiliation: Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran. Electronic address: akianfar@cc.iut.ac.ir.
authors.forename: Ali Hossein
authors.initials: AH
authors.lastname: Kianfar
authors.affiliation: Department of Chemistry, Universiti Sains Malaysia, Penang, Malaysia.
authors.forename: Wan Ahmad Kamil
authors.initials: WA
authors.lastname: Mahmood
authors.affiliation: Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Dinari
authors.affiliation: Department of Chemistry, Universiti Sains Malaysia, Penang, Malaysia.
authors.forename: Mohammad Hossein
authors.initials: MH
authors.lastname: Azarian
authors.affiliation: Department of Chemistry, College of Sciences Yasouj University, Yasouj, Iran.
authors.forename: Fatemeh Zare
authors.initials: FZ
authors.lastname: Khafri
mesh_terms: D000538:Aluminum Silicates; D000077215:Clay; D003035:Cobalt / Q000737:chemistry*; D005029:Ethylenediamines / Q000138:chemical synthesis* / Q000737:chemistry*; D015394:Molecular Structure; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D012545:Schiff Bases
chemical_list: D000538:Aluminum Silicates; D005029:Ethylenediamines; D012545:Schiff Bases; D003035:Cobalt; C011452:disalicylaldehyde ethylenediamine; D000077215:Clay
keywords: Cobalt Schiff base complexes; Cobalt(III) phosphine complexes; Insertion compounds; Modified clay; X-ray crystallography