title: Paramagnetic resonance and visible spectroscopic properties of binuclear Cu-Cu and Cu-Zn imidazolate-bridged complexes: effective model for active site of superoxide dismutase.
abstract: Syntheses of the imidazolate-bridged heterometallic binuclear copper-zinc complex [(glyala)Cu-im Zn(g-lyala)]Na, where H2glyala = glycylalanine, and im = imidazolate ion, has been achieved. X-band e.p.r and visible absorption spectra of the complex [(glyala)Cu-im-Zn(glyala)]Na at different pH values in frozen solution (50% aqueous DMSO, 77K) show that the imidazolate-bridged complex is stable in the pH range 7.15-10.50.
authors.affiliation: Department of Chemistry, APS University, Rewa, India. pandey-ds@lycos.com
authors.forename: R N
authors.initials: RN
authors.lastname: Patel
authors.forename: S
authors.initials: S
authors.lastname: Kumar
authors.forename: K B
authors.initials: KB
authors.lastname: Pandeya
mesh_terms: D003300:Copper / Q000737:chemistry; D004151:Dipeptides / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D007093:Imidazoles / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D013054:Spectrophotometry, Atomic; D013482:Superoxide Dismutase / Q000737:chemistry; D015032:Zinc / Q000737:chemistry
chemical_list: D004151:Dipeptides; D007093:Imidazoles; D009942:Organometallic Compounds; C424698:aqua(glycylalanyl)copper(II); D003300:Copper; D013482:Superoxide Dismutase; D015032:Zinc