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Iodide-selective polymeric membrane electrode based on copper(Ⅱ) bis(N-2-bromophenylsalicyldenaminato) complex

Chinese Chemical Letters 2011年第9期22卷 1087-1090页

作者： Ali Benvidi M.T.Ghanbarzadeh M.Mazloum-Ardakani r.vafazadeh Department of Chemistry Yazd UniversityYazdIran

A PVC membrane electrode based on copper（II） bis（N-2-bromophenylsalicyldenaminato） as ionophor was prepared. The ion selective electrode was tested by inorganic anions and showed a good selectivity for iodide ion. This sensor exhibited Nernstian behavior with a slope of -57.8 mV per decade at 25℃. The proposed electrode showed a linear range from 1.0 × 10 ^-5 to 1.0 × 10 ^-1 mol/L with a detection limit of 5.0 × 10 ^-6 mol/L. The electrode response was independent of pH in the range of 3.0- 10.0. The proposed sensor was applied to determine the iodide in water and antiseptic samples.

关键词： Iodide-selective electrode Polymeric membrane Potentimetry

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Thiocyanate ion selective electrode based on bis(N-3-methylphenyl salicylidenaminato)copper(Ⅱ) ionophore

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Chinese Chemical Letters 2014年第12期25卷 1639-1642页

作者： A.Benvidi M.T.Ghanbarzadeh M.Dehghan M.Mazloum-Ardakani r.vafazadeh Department of Chemistry Faculty of ScienceYazd University

In this work a PVC membrane electrode based on bis（N-3-methyl phenyl salicylidenaminato）copper（II）as ionophore was *** electrode was tested by inorganic anions and showed good selectivity for thiocyanate *** sensor showed Nerstian behavior with a slope of a-59.3 mV per decade at 25℃.The proposed electrode exhibited a wide linear range from 1.0 × 10^-6 mol/L to 1.0× 10^-1 mol/L with a detection limit of 5.0×10^-7 mol/*** electrode response was independent of pH in the range of *** response time is about 9-21s,and the electrode can be used for over 60 days without considerable *** prepared sensor was applied as an indicator electrode in potentiometric titration of SCN^- with Ag^＋ ion and to determine the thiocyanate in samples of urine and saliva.

关键词： Thiocyanate PVC membrane electrode Potentiometric determination lonophore

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掺杂双(N-2-甲基苯基-水杨醛亚胺)合铜(II)配合物的碳糊电极电催化测量过氧化氢(英文)

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催化学报 2014年第2期35卷 247-254页

作者： Hossein Khoshro Hamid r. Zare rasoul vafazadeh Department of Chemistry Yazd University Yazd 89195-741 Iran

The electrochemical behavior of a bis (N-2-methylphenyl-salicyldenaminato)copper (II) complex spiked in a carbon paste electrode (BMPSCu-CPE) and its electrocatalytic reduc-tion of H2 O2 were examined using cyclic voltammetry, chronoamperometry, and differen-tial pulse voltammetry. Cyclic voltammetry was used to study the redox properties of BMPSCu-CPE at various potential scan rates. The apparent charge transfer rate constant and the transfer coefficient for the electron transfer between BMPSCu and the carbon paste electrode (CPE) were 1.9 ± 0.1 s–1 and 0.43, respectively. BMPSCu-CPE had excel-lent electrocatalytic activity for H2 O2 reduction in 0.1 mol/L phosphate buffer solution (pH 5.0), and it decreased the overpotential by 300 mV as compared to CPE alone. The diffusion coefficient and kinetic parameters such as the heterogeneous catalytic electron transfer rate constant and electron transfer coefficient for the reduction of H2 O2 at the BMPSCu-CPE surface were also determined using electrochemical methods. Differential pulse voltammetry showed two linear dynamic ranges of 1.0–10.0 and 10.0–300.0 μmol/L and a detection limit of 0.63 μmol/L H2 O2. The BMPSCu-CPE has excellent repro-ducibility and long term stability, and it was successfully applied for the determination of H2 O2 in two pharmaceutical samples: an antiseptic solution and a hair dying cream.

关键词：碳糊电极过氧化氢甲基苯基电测量氢浓度电催化还原差分脉冲伏安法微分脉冲伏安法

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