Polarographic Studies of Dispersed Dyes Solubilized in Surfactant Solutions. I. Kinetics of Orange OT Solubilized in Surfactant Solutions

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概要

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• Orange OT (l-<I>o</I>-tolyl-azo-2-naphthol) dissolved in an aqueous ethanol solution and solubilized in various surfactant solutions, containing a citric acid-disodium hydrogen phosphate buffer, showed well-defined irreversible polarographic waves. The anionic, cationic, and nonionic surfactants used were sodium dodecyl sulfate (SDS) and sodium dodecylbenzenesulfonate (SDBS), dodecyltrimethylammonium chloride (DTMAC), and polyoxyethylene nonylphenyl ether (NP-\bar10) respectively. The values multiplying the transfer coefficient by the number of electrons involved in the activation step, (α<I>n</I><SUB>a</SUB>), were calculated from the semilogarithmic plot of the wave. The plots of α<I>n</I><SUB>a</SUB> against the half-wave potential of Orange OT for each solution showed that a marked surfactant electric-charge dependence of α<I>n</I><SUB>a</SUB> was observed with a variety of surfactant solutions; <I>i.e.</I>, the electric-charges of the surfactant molecules or micelles remarkably affected the electrode kinetics of the solubilized Orange OT. No matter what Orange OT is an uncharged species, Orange OT solubilized in the anionic surfactant solutions seemed to behave in the electrode process as if it were an anionic species, and when solubilized in the cationic and nonionic surfactant solutions it seemed to behave as a cationic species.

• 公益社団法人 日本化学会の論文

著者

• Hayano Shigeo

  Institute of Industrial Science, The University of Tokyo

• Shinozuka Noriko

  Institute of Industrial Science, The University of Tokyo

• Suzuki Hajime

  Institute of Industrial Science, The University of Tokyo

関連論文

• The Protonation of Aromatic Hydrocarbon Radical Anions. I. A Comparison of Methods and a Study of the Mechanism
• On the Polarographic Limiting Current of Solubilized Dye in Nonionic Surfactant Solutions
• The Polarography of Alkyl Hydroperoxides in an Aqueous Solution
• Critical micelle concentration reduction of aqueous sodium dodecyl sulfate solutions upon the addition of alcohols.
• Polarographic Studies of Dispersed Dyes Solubilized in Surfactant Solutions. I. Kinetics of Orange OT Solubilized in Surfactant Solutions
• The Solubilization of Orange OT in Anionic Surfactant Solutions: A Polarographic Study
• The Solvent Effect on the Visible Absorption Spectra of the Radical Anion and the Dianion of Anthraquinone
• Ionic adsorption of lithium bromide at the mercury-dimethyl sulfoxide interface.
• The Protonation of Aromatic Hydrocarbon Radical Anions. II. Interpretations of the Rate Constants in Terms of HMO Calculations

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