| 20145858 |
Maier F, Cremer T, Kolbeck C, Lovelock KR, Paape N, Schulz PS, Wasserscheid P, Steinruck HP: Insights into the surface composition and enrichment effects of ionic liquids and ionic liquid mixtures. Phys Chem Chem Phys. 2010 Feb 28;12(8):1905-15. Epub 2010 Jan 9.
By reviewing recent and presenting new results for imidazolium-based ionic liquids (ILs), we discuss the impact of chemical differences on surface composition and on surface enrichment effects. (1) For the hydrophilic ethylene glycol (EG) functionalised ILs [Me (EG) MIm][Tf (2) N], [Et (EG)(2) MIm][Tf (2) N] and [Me (EG)(3) MIm][Tf (2) N], which vary in the number of ethylene glycol units (from 1 to 3), we find that the surface composition of the near-surface region is in excellent agreement with the bulk composition, which is attributed to attractive interactions between the oxygen atoms on the cation to the hydrogen atoms on the imidazolium ring. (2) For [C (n) C (1) Im][Tf (2) N] (where n = 1-16), i.e. |
31(0,1,1,1) |
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