Comparing the charge distribution along the surface normal in the [C6mim]+ ionic liquid with different anions

Christiaan Ridings, Vera Lockett, Gunther Andersson

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    Concentration depth profiles of the elements in [C6mim]X (X=[BF4]- and [Cl]-) have been determined using neutral impact collision ion scattering spectroscopy in order to investigate how the choice of the anion influences the surface structure of the [C6mim]+ ionic liquids. The results show that the more polarisable, fluorinated anion [BF4]-, has a stronger tendency to adsorb to the surface compared to [Cl]-. While the [BF4]- intermingles with the cation aliphatic chains, the decreased surface propensity of the [Cl]- allows for the preferential orientation of the cation aliphatic chains pointing towards the vapour phase.

    Original languageEnglish
    Pages (from-to)149-153
    Number of pages5
    JournalColloids and Surfaces A-Physicochemical and Engineering Aspects
    Volume413
    DOIs
    Publication statusPublished - 5 Nov 2012

    Keywords

    • Depth profile
    • Ionic liquid
    • Surface charge

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