Electrochemical Reduction of Iodine in Non-aqueous Solvents

물아닌 용매속에서의 요오드의 전기화학적 환원

  • Published : 1975.04.30

Abstract

The electrochemical reduction of iodine in non-aqueous media have been studied by polarography, chronopotentiometry, cyclic voltammetry and controlled potential coulometry at dropping mercury electrode and platinum, gold and amalgamated platium electrodes. In amphiprotic solvents such as methanol, ethanol, isopropanol and pyridine, iodine were reduced to iodide ions via one step reduction involving 1 electron and in aprotic solvents such as acetonitrile, dimethylformamide and dimethylsulfoxide via two step reduction involving all 3 electrons. The reductions of iodine give well defined polarograms at dropping mercury electrode and irreversible chronopotentiograms at platinum electrode, but less defined irreversible chronopotentiograms at gold and amalgamated platinum electrodes, those are all diffusion controlled. The diffusion coefficients of iodine in various solvents were estimated from the chronopotentiometric data and Sand equation.

Keywords

References

  1. J. Amer. Chem. Soc. v.75 I. M. Kolthoff;J. Jordan
  2. J. Amer. Chem. Soc. v.79 F. C. Anson;J. J. Lingane
  3. J. Amer. Chem. Soc. v.80 A. I. Popov;D. H. Geske
  4. Anal. Chem. v.30 R. N. Adams;J. H. McClure;J. B. Morris
  5. J. Amer. Chem. Soc. v.73 P. Delahay;J. E. Strassner
  6. Electroanal. Chem. Interfacial Electrochemistry v.54 F. Secco;M. Venturini
  7. Anal. Chem. v.43 B. Jaselskis;J. L. Huston
  8. Pure and Applied Chemistry v.13 J. F. Coetzee
  9. Pure and Applied Chemistry v.27 T. B. Reddy
  10. J. Amer. Chem. Soc. v.79 I. M. Kolthoff;J. F. Coetzee
  11. Electrochimica Acta. v.18 C. M. Pak;W. M. Gulick
  12. Phil. Mag. v.1 H. J. S. Sand
  13. Z. Elektrochem. v.57 M. Stackelberg;M. Pilgram;V. Toome
  14. Analyst Chem. v.34 S. A. Moros
  15. J. Amer. Chem. Soc. v.75 J. Berzins;P. Delahay
  16. J. Amer. Chem. Soc. v.75 P. Delahay;J. Berzins
  17. Anal. Chem. v.42 I. M. Kolthoff;M. K. Chantooni, Jr.;H. Smagowski
  18. J. Amer. Chem. Soc. v.83 I. M. Kolthoff;Y. Okinaka
  19. J. Amer. Chem. Soc. v.67 J. J. Lingane
  20. Anal. Chem. v.37 J. F. O'Donnel;J. T. Ayres;C. K. Mann
  21. Analyst Chem. v.25 T. M. Marple;L. B. Rogers
  22. J. Amer. Chem. Soc. v.79 I. M. Kolthoff;J. F. Coetzee