title: Cu(II) and Pd(II) complexes of water soluble O-carboxymethyl chitosan Schiff bases: Synthesis, characterization.
abstract: This study reports the synthesis of two new water soluble O-carboxymethyl chitosan Schiff bases (OCMCS-5 and OCMCS-6a) and their Cu(II) and Pd(II) complexes. Characterizations of these complexes were carried out with FTIR, elemental analysis, (13)C CPMAS, UV-vis, magnetic moment and molar conductivity techniques. The degrees of substitution (DS) for OCMCS-5a and OCMCS-6a were determined to be 0.48 and 0.44 in elemental analysis. The solubility test revealed that OCMCS-5a and OCMCS-6a dissolved thoroughly in water. The surface morphologies of chitosan (CS), OCMCS-5a, OCMCS-6a and their complexes were studied with SEM-EDAX. Thermal stability of the synthesized compounds was evaluated by TG/DTG and their crystallinity values were investigated with powder X-ray diffraction. Cu(II) and Pd(II) contents of the complexes were estimated with ICP-OES. The characterization studies demonstrated that the thermal stability and crystallinity values of the OCMCS-5a and OCMCS-6a were lower than those of CS.
authors.affiliation: Department of Chemistry, Faculty of Science and Letters, Aksaray University, Aksaray, Turkey.
authors.forename: Talat
authors.initials: T
authors.lastname: Baran
authors.affiliation: Department of Chemistry, Faculty of Science and Letters, Aksaray University, Aksaray, Turkey. Electronic address: ayfermentes@yahoo.com.
authors.forename: Ayfer
authors.initials: A
authors.lastname: Menteş
mesh_terms: D048271:Chitosan / Q000031:analogs & derivatives* / Q000138:chemical synthesis; D056831:Coordination Complexes / Q000138:chemical synthesis*; D003300:Copper / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D012545:Schiff Bases / Q000138:chemical synthesis; D012995:Solubility; D012996:Solutions; D014961:X-Ray Diffraction
chemical_list: D056831:Coordination Complexes; C504164:O-carboxymethylchitosan; D012545:Schiff Bases; D012996:Solutions; D010165:Palladium; D003300:Copper; D048271:Chitosan
keywords: Chitosan; O-carboxymethyl; Schiff base