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Electrochemical properties of modified carbon paste electrodes containing some amino derivatives of 9,10-anthraquinone |
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| Authors: | Mojtaba Shamsipur Abdollah Salimi Seyed Mehdi Golabi Hashem Sharghi Mir Fazlollah Mousavi |
| Institution: | (1) Department of Chemistry, Razi University, Kermanshah, Iran, IR;(2) Department of Chemistry, Tarbiat Modarres University, Tehran, Iran, IR;(3) Electroanalytical Chemistry Laboratory, Faculty of Chemistry, University of Tabriz, Tabriz, Iran, IR;(4) Department of Chemistry, Shiraz University, Shiraz, Iran, IR |
| Abstract: | The preparation and aqueous electrochemistry of carbon paste electrodes modified by some amino-substituted 9,10-anthraquinones are reported. In all cases, the reduction processes studied by cyclic voltammetry reveal a quasi-reversible behavior. The half-wave potentials were calculated as a function of the solution pH and from the resulting potential-pH plots the formal potentials and pK a ′ values of different redox and acid-base couples involved at various pH ranges were evaluated. The diffusion coefficients of different anthraquinone derivatives used in paraffin oil were calculated by chronoamperometry. Received: 3 May 1999 / Accepted: 15 November 1999 |
| Keywords: | Carbon paste Amino anthraquinones Cyclic voltammetry Chronoamperometry Diffusion coefficient |
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