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Selectivity in micellar chromatography using a zwitterionic surfactant.

J P Berry, S G Weber

    Journal of Chromatographic Science
    |July 1, 1987
    PubMed
    Summary
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    Neutral zwitterionic micelles influence how substituted benzene compounds are retained. Molecular properties like charge and hydrophobicity dictate solute distribution, offering different selectivity than traditional reversed-phase methods.

    Area of Science:

    • Analytical Chemistry
    • Separation Science
    • Supramolecular Chemistry

    Background:

    • Zwitterionic surfactants form micelles with unique properties.
    • Understanding solute-micelle interactions is crucial for separation optimization.
    • Reversed-phase chromatography is a standard separation technique.

    Purpose of the Study:

    • To investigate the impact of N-dodecyl-N,N-dimethylammonium-3-propane-1-sulfonate (C12DAPS) micelles on the retention of substituted benzenes.
    • To correlate molecular properties with solute retention within these micelles.
    • To compare the selectivity of C12DAPS micelles with conventional reversed-phase stationary phases.

    Main Methods:

    • Micellar chromatography using C12DAPS.
    • Analysis of various substituted benzene compounds.

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  • Correlation analysis between molecular properties (charge, hydrophobicity, polarizability) and retention data.

    • Main Results:

    • Solute retention in C12DAPS micelles is significantly influenced by negative charge, hydrophobicity, and polarizability.
    • The distribution of solutes within the micelles is governed by these molecular properties.
    • C12DAPS micelles exhibit distinct selectivity compared to standard reversed-phase materials.

    Conclusions:

    • Neutral zwitterionic micelles offer alternative selectivity in chromatographic separations.
    • Molecular properties are key determinants of solute partitioning in micellar environments.
    • This approach provides a valuable alternative for separating challenging isomers like nitrophenols and halobenzenes.