The Electron Spin Resonance of the Mn<SUP>2+</SUP> Ion in Aqueous Surfactant Solutions

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概要

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• The ESR spectrum of the Mn<SUP>2+</SUP> ion in an aqueous solution of a surfactant is affected by its concentration. Sodium dodecyl sulfate and sodium decyl sulfate were employed as surfactants in this study. The linewidth of the Mn<SUP>2+</SUP> ion is independent of the concentration of the surfactant in the low-concentration range, but it increases over a certain concentration range and then becomes constant. Two values of CMC were observed by measurements of the conductivity corresponding to the concentrations, where the linewidth of Mn<SUP>2+</SUP> changed abruptly with the concentration of the surfactant. The linewidth broadening above the first CMC was interpreted as being due to the formation of an outer-sphere complex of the Mn<SUP>2+</SUP> ion with a surfactant micelle. The interaction between the counterion and micelle was also investigated on the basis of the ESR spectra of the Mn<SUP>2+</SUP> ion with regard to the effects of the kind of surfactant, the temperature, foreign electrolytes, <I>etc.</I>

• 公益社団法人 日本化学会の論文

著者

• Hasegawa Akinori

  Department Of Chemistry Kogakkanuniversity

• Miura Masaji

  Department of Chemistry, Faculty of Science, Hiroshima University

• Michihara Yasuyoshi

  Department of Chemistry, Faculty of Science, Hiroshima University

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