Influence of different substituents on the surface composition of ionic liquids studied using ARXPS

Lovelock K, Kolbeck C, Cremer T, Paape N, Schulz P, Wasserscheid P, Maier F, Steinrück HP (2009)

Publication Type: Journal article

Publication year: 2009

Journal

Original Authors: Lovelock K.R.J., Kolbeck C., Cremer T., Paape N., Schulz P.S., Wasserscheid P., Maier F., Steinrück H.-P.

Publisher: American Chemical Society

Book Volume: 113

Pages Range: 2854-2864

Journal Issue: 9

DOI: 10.1021/jp810637d

Abstract

Angle resolved X-ray photoelectron spectroscopy has been used to study the surface composition of various nonfunctionalized and functionalized 1,3-dialkylimidazolium ionic liquids. For [C C Im][Tf N] (where n ) 2-16), an enrichment of the aliphatic carbon was observed for longer chains (n ≥ 4). Enrichment of the aliphatic carbon also occurs for alkyl chains attached to the anion, as observed for [C C Im][OcOSO ]. Oligo(ethyleneglycol)ether (PEG) functionalities in the cation lead to a surface composition close to bulk stoichiometry and thus a loss in enrichment of the chains. This effect is attributed to attractive interactions between the oxygen atoms on the cation to the hydrogen atoms on the imidazolium ring for [Et(EG) MIm][Tf N] and [Me(EG) MIm][Tf N]. © 2009 American Chemical Society.

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APA:

Lovelock, K., Kolbeck, C., Cremer, T., Paape, N., Schulz, P., Wasserscheid, P.,... Steinrück, H.-P. (2009). Influence of different substituents on the surface composition of ionic liquids studied using ARXPS. Journal of Physical Chemistry B, 113(9), 2854-2864. https://doi.org/10.1021/jp810637d

MLA:

Lovelock, Kevin, et al. "Influence of different substituents on the surface composition of ionic liquids studied using ARXPS." Journal of Physical Chemistry B 113.9 (2009): 2854-2864.

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