Magnetic, epr and SOD studies of some Cu(II)-Cu(II), Cu(II)-Ni(II) and Cu(II)-Zn(II) imidazolate bridged complexes.
Magnetic, spectroscopic and superoxide dismutase activity of imidazolate bridged [(Salala)Cu-Im-Cu(Salala)]Na, [(Salala)Cu-Im-Zn(Salala)]Na and [(Salala)Cu-Im-Ni(Salala)]Na (Salala=Salicyledenealiniate, Im=Imdiazolate) are described. The epr and electronic spectra of related mononuclear complexes, viz., [(Salala)Cu-OH(2)] and [(Salala)Cu-ImH] also described. Appearance of a half-field signal in polycrystalline and decrease in mu(eff) per copper(II) ion indicate super exchange coupling between copper(II) ion in [(Salala)Cu-Im-Cu(Salala)]Na binuclear complex. A pH-dependent epr and UV-vis study of 50% aqueous DMSO solution of binuclear complexes suggest that the complexes are stable in narrow pH range.
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Department of Chemistry, A.P.S. University, Rewa (M.P.) 486003, India. rnp64@yahoo.co.uk
D003300:Copper / Q000032:analysis / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007093:Imidazoles / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008280:Magnetics; D008956:Models, Chemical; D009532:Nickel / Q000032:analysis / Q000737:chemistry*; D013053:Spectrophotometry; D013482:Superoxide Dismutase / Q000737:chemistry*; D014466:Ultraviolet Rays; D015032:Zinc / Q000032:analysis / Q000737:chemistry*
D007093:Imidazoles; D003300:Copper; C029899:imidazole; D009532:Nickel; D013482:Superoxide Dismutase; D015032:Zinc