title: A novel dinuclear Schiff-base copper(II) complex modified electrode for ascorbic acid catalytic oxidation and determination.
abstract: A new dinuclear copper salicylaldehyde-glycine Schiff-base complex [Cu(2)(Sal-Gly)(2)(H(2)O)(2)] was synthesized and structurally characterized. [Cu(2)(Sal-Gly)(2)(H(2)O)(2)] crystallized in the monoclinic system in the P2(1)/c space group. The molecule is a dinuclear complex, formed by two [Cu(Sal-Gly)(H(2)O)] units. The electropolymerization properties of the copper complex on a glass carbon electrode were studied at different potential ranges. The electropolymerization occurred when the high scan potential reached 1.4 V. The modified electrode exhibited good electrocatalytic oxidation properties to ascorbic acid and showed a sensitivity of 22.9 nA μM(-1) (r(2) = 0.9998) and detection limit of 0.39 μM (S/N = 3) in the amperometric determination of ascorbic acid. The designed determination method can be used to analyze vitamin C tablets.
authors: Department of Chemistry, School of Science, Wuhan University of Technology, Wuhan, 430070, PR China.
authors: Zhijun
authors: Z
authors: Zhang
authors: Xi
authors: X
authors: Li
authors: Chenggang
authors: C
authors: Wang
authors: Chaocan
authors: C
authors: Zhang
authors: Peng
authors: P
authors: Liu
authors: Tingting
authors: T
authors: Fang
authors: Yan
authors: Y
authors: Xiong
authors: Wenjing
authors: W
authors: Xu
mesh_terms: D000447:Aldehydes / Q000737:chemistry; D001205:Ascorbic Acid / Q000032:analysis* / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D004563:Electrochemistry; D004566:Electrodes; D005998:Glycine / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D058105:Polymerization; D012545:Schiff Bases / Q000737:chemistry
chemical_list: D000447:Aldehydes; D009942:Organometallic Compounds; D012545:Schiff Bases; C013243:salicylaldehyde; D002244:Carbon; D003300:Copper; D001205:Ascorbic Acid; D005998:Glycine