The Raman Spectra of Surfactants and The Concentration Dependence of Their Molecular Conformations in Aqueous Solutions
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概要
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The laser Raman scattering by potassium <I>n</I>-alkyl carboxylates and sodium <I>n</I>-alkyl sulfates was measured in the solid state and aqueous solutions, and the concentration dependence of molecular conformations of these molecules was studied. For aqueous solutions of potassium <I>n</I>-hexanoate and potassium <I>n</I>-pentanoate, the Raman intensities of the accordion vibrations of the all-<I>trans</I> form relative to the skeletal deformation vibrations of the <I>gauche</I> isomers were found to increase with an increase in the concentration. This intensity change is remarkable at the critical micelle concentration. A concentration dependence of the intensity of the Raman lines was also observed in the frequency region of 1600–600 cm<SUP>−1</SUP>. These observations revealed that the percentage of the all-<I>trans</I> form of the surfactant molecules increases with an increase in the concentration above the critical micelle concentration.
- 公益社団法人 日本化学会の論文
著者
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Kitagawa Teizo
Instisute For Molecular Science Okazaki National Research Institutes
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OKABAYASHI Hirofumi
Department of Applied Chemistry, Nagoya Institute of Technology
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Okuyama Masataka
Department of Engineering Chemistry, Nagoya Institute of Technology
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Kitagawa Teizo
Institute of Protein Research, Osaka University
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