title: An unexpected Schiff base-type Ni(II) complex: synthesis, crystal structures, fluorescence, electrochemical property and SOD-like activities.
abstract: An unexpected Schiff base-type Ni(II) complex, [Ni(L(2))2]⋅CH3OH (HL(2) = 1-(2-{[(E)-3, 5-dibromo-2-hydroxybenzylidene]amino}phenyl)ethanone oxime), has been synthesized via complexation of Ni(II) acetate tetrahydrate with HL(1) (2-(3,5-dibromo-2-hydroxyphenyl)-4-methyl-1,2-dihydroquinazoline 3-oxide) originally. HL(1) and its corresponding Ni(II) complex were characterized by IR, (1)H NMR spectra, as well as by elemental analysis, UV-Vis and emission spectroscopy, respectively. Crystal structures of the ligand and complex have been determined by single-crystal X-ray diffraction. Each complex links two other molecules into an infinite 1-D chain via intermolecular hydrogen bonding interactions. Moreover, the electrochemical property of the nickle complex was studied by cyclic voltammetry. In addition, SOD-like activities of HL(1) and Ni(II) complex were also investigated.
authors.affiliation: School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China. Electronic address: chailanqin@163.com.
authors.forename: Lan-Qin
authors.initials: LQ
authors.lastname: Chai
authors.affiliation: Second Hospital of Lanzhou University, Lanzhou, Gansu 730030, China. Electronic address: jijiuyish@163.com.
authors.forename: Hong-Song
authors.initials: HS
authors.lastname: Zhang
authors.affiliation: School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
authors.forename: Jiao-Jiao
authors.initials: JJ
authors.lastname: Huang
authors.affiliation: School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
authors.forename: Yu-Li
authors.initials: YL
authors.lastname: Zhang
mesh_terms: D003460:Crystallization; D018360:Crystallography, X-Ray; D004563:Electrochemistry; D006860:Hydrogen Bonding; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008670:Metals / Q000737:chemistry; D008968:Molecular Conformation; D009532:Nickel / Q000737:chemistry*; D010084:Oxidation-Reduction; D012545:Schiff Bases / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013482:Superoxide Dismutase / Q000737:chemistry*
chemical_list: D008024:Ligands; D008670:Metals; D012545:Schiff Bases; D009532:Nickel; D013482:Superoxide Dismutase
keywords: Crystal structures; Cyclic voltammetry; Quinazoline-type ligand; Schiff base-type complex; Spectroscopic properties; Superoxide dismutase activities