Cyclic voltammetric study of the redox behavior of Fe(II)/Fe(III) systems forming during the oxidation of Fe(II) complexes with saccharin and with saccharin and 1,10-phenanthroline |
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| Authors: | H M Naseem Akhtar A A Shaikh M Q Ehsan |
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| Institution: | (1) Department of Chemistry, University of Dhaka, Dhaka, 1000, Bangladesh |
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| Abstract: | The electrochemical redox behavior of Fe(II)/Fe(III) systems formed during the oxidation of complexes Fe(C7H4NO3S)2(H2O)4] · 2H2O (Fe-sac) and Fe(C7H4NO3S)2(C12H8N2] · 2H2O (Fe-sac-phen) have been investigated using cyclic voltammetry in the aqueous medium. In the CVs one pair of well-defined
cathodic and anodic peaks appear for the transfer of single electron in the Fe-sac complex. The peak potentials are much wider
separated as compared with the free (uncoordinated) Fe(II)/Fe(III) system. The ΔE values demonstrate that the electrode process is irreversible. In the presence of secondary ligand, 1,10-phenanthroline (Fe-sac-phen
complex), the redox behavior of iron complexes is quasireversible. The effect of pH on the redox behavior of iron system is
studied in acetate buffer.
Published in Russian in Elektrokhimiya, 2008, Vol. 44, No. 12, pp. 1504–1509.
The text was submitted by author in English |
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| Keywords: | saccharin 1 10-phenanthroline iron(II) iron(III) complex cyclic voltammetry electrode kinetics |
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