Ali Alinezhad

University of Mazandaran, Bābolsar, Mazandaran, Iran

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Publications (4)7.91 Total impact

  • R. Ojani, J. B. Raoof, A. Alinezhad
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    ABSTRACT: Electrocatalytic oxidation of sulfite with some ferrocene derivatives such as ferroceneacetic acid, ferrocenemonocarboxylic acid and ferrocenemethanol as mediator were studied by cyclic voltammetry in aqueous solution with various pH at glassy carbon electrode. Results showed that the sulfite coupled catalytically only to ferrocenecarboxylic acid exihibiting homogeneous second-order rate constant Ks, 1.5×103 M−1 s−1. The catalytic oxidation peak current was linearly dependent on the sulfite concentration and the linearity range obtained was 4×10−4–1×10−2 M. Detection limit has been determined 2.5×10−4 M. This catalytic oxidation of sulfite has been applied as a selective, simple and precise new method for determination of sulfite in a real sample.
    Electroanalysis 09/2002; 14(17):1197 - 1202. · 2.82 Impact Factor
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    ABSTRACT: Poly (m-toluidine) (PMT) was formed by successive cyclic voltammetry in a monomer solution containing Triton X-100 (TX-100) at the surface of carbon paste electrode (CPE). Nickel was then incorporated into the polymer by electrodeposition of Ni(II) from NiSO4 acidic solution. The electrochemical behavior of this modified electrode (Ni/PMT(TX-100)/MCPE) was investigated in the electrooxidation of ethylene glycol (EG) using cyclic voltammetry and chronoamperometry techniques. Among the electrodes [Ni/PMT(TX-100)/MCPE, Ni/PMT/MCPE, Ni/MCPE, PMT(TX-100)/MCPE, and CPE] used in this study, Ni/PMT(TX-100)/MCPE showed the most effective catalytic activity. The effects of various parameters such as film thickness, electrodepositing time, TX-100 concentration, MT concentration, and EG concentration were investigated on the electrocatalytic oxidation of EG at the surface of Ni/PMT(TX-100)/MCPE. The catalytic rate constant (k) for EG oxidation was also calculated to be 2.1 × 106 cm3 mol−1 s−1 using a chronoamperometric method.
    Journal of Applied Electrochemistry 43(9). · 1.84 Impact Factor
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    ABSTRACT: AbstractElectro-oxidation of catechol in the presence of 2-methyl-1,3-cyclopentanedione as a nucleophile was investigated in water–acetonitrile (90:10 v/v) solution. The results indicate that the o-benzoquinone electrogenerated participates in a Michael addition reaction with this nucleophile. The electrosynthesis of 2-(3,4-dihydroxyphenyl)-2-methylcyclopentane-1,3-dione was carried out. The product was characterized by NMR, MS, FT-IR, and elemental analysis. An EC mechanism was deduced from voltammetric and spectroscopic data. Also, the Michael addition reaction rate constant (k m) was estimated using digital simulation of voltammograms. Graphical abstract
    Monatshefte fuer Chemie/Chemical Monthly 140(5):503-508. · 1.63 Impact Factor
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    ABSTRACT: AbstractA sensitive and selective procedure for the determination of silver(I) at p-isopropylcalix[6]arene modified carbon paste electrode has been developed. Silver(I) was accumulated in open-circuit design on the electrode surface via complex formation with the modifier at pH 9.00. After electrochemical reduction of silver(I), the anodic stripping wave of silver(0) appeared at +0.04V versus reference electrode on scanning the potential in the positive direction in 0.1M H2SO4+2.0×10−2M KBr. The effects of various parameters such as preconcentration time, stripping medium, reduction potential, etc. were investigated. In the optimum condition, a linear calibration curve was obtained in the range of 5.0×10−8M to 2×10−6M with detection limit (3δ) of 4.8×10−8M. Many coexisting metal ions had little effect on the determination of silver(I). Also, the proposed method was applied to the determination of silver(I) in X-ray photographic film samples. The results were in good agreement with those obtained by atomic absorption spectroscopy (AAS). Graphical abstract Keywords p-Isopropylcalix[6]arene-Differential pulse voltammetry-Silver (I)-Stripping analysis-Modified carbon paste electrode
    Monatshefte fuer Chemie/Chemical Monthly 141(3):279-284. · 1.63 Impact Factor