Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Association of Methyl Viologen and Its Cationic Radical with Sodium Dodecyl Sulfate

  • Park, Joon-Woo (Department of Chemistry, College of Natural Sciences, Ewha Womans University) ;
  • Nam, Hye-L. (Department of Chemistry, College of Natural Sciences, Ewha Womans University)
  • Published : 1984.10.20
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Abstract

The polarographic and conductometric studies of methyl viologen $(MV^{++})$ solutions with varying concentration of sodium dodecyl sulfate (SDS) showed strong association of $MV^{++}$ and its cationic radical, $MV^+$., with SDS below the critical micelle concentration. The stoichiometries of these associations were found to be their electric charge ratios. Both electrostatic and hydrophobic interactions were found to contribute to the associations. The formation constant of$MV^+.DS^-$ in 0.1 M NaCl was $7{\times}10^3M$. The $MV^{++}$-SDS association was observed to be cooperative leading to formation of large aggregates. In the presence of $MV^{++}$, the micellization of SDS was formation of SDS homo-micelle without direct involvement of $MV^{++}$.

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