title: Synthesis and aqueous solution properties of multinuclear oxo-bridged vanadium(IV/V) complexes.
abstract: Reaction of the multifunctional phenolic ligands 2,5-bis[N,N-bis(carboxymethyl)aminomethyl]hydroquinone (H6cahq), 2,2'-bis[N,N-bis(carboxymethyl)aminomethyl]-4,4'-isopropylidenediphen ol(H6capd),2,2',2''-tris[N,N-bis(carboxymethyl)aminomethyl]-1,1 ,1-tris(4-hydroxyphenyl)ethane (H9catp) and the monofunctional 2-[N,N-bis(carboxymethyl)aminomethyl]-4-carboxyphenol (H3cacp), with VOSO4 and NaVO3 affords the oxo-bridged mixed-valence vanadium(IV/V) Na6[(VO)4(mu-O)2(mu-cahq)2] x Na2SO4 x 20H2O (1), HnNa(3-n)[(VO)2(mu-O)(mu-cacp)2] (2), HnNa(3-n)[(VO)4(mu-O)2(mu-capd)2] (3), HnNa(9-n)[(VO)6(mu-O)3(mu3-catp)2] (4). In addition to the synthesis, we report the infrared, magnetic, optical and electrochemical properties of these complexes. The hydrolytic stability at different pH values was also investigated using visible spectroscopy.
authors.affiliation: University of Cyprus, Department of Natural Sciences, Nicosia.
authors.forename: C
authors.initials: C
authors.lastname: Drouza
authors.forename: A D
authors.initials: AD
authors.lastname: Keramidas
mesh_terms: D004563:Electrochemistry; D006863:Hydrogen-Ion Concentration; D008958:Models, Molecular; D010636:Phenols / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D017968:Vanadium Compounds / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D010636:Phenols; D017968:Vanadium Compounds