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Influence of substituents and functional groups on the surface composition of ionic liquids

Kolbeck, C., Niedermaier, I., Deyko, A., Lovelock, K. R. J., Taccardi, N., Wei, W., Wasserscheid, P., Maier, F. and Steinrück, H.-P. (2014) Influence of substituents and functional groups on the surface composition of ionic liquids. Chemistry- A European Journal, 20 (14). pp. 3954-3965. ISSN 1521-3765

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To link to this item DOI: 10.1002/chem.201304549


We have performed a systematic study addressing the surface behavior of a variety of functionalized and non‐functionalized ionic liquids (ILs). From angle‐resolved X‐ray photoelectron spectroscopy, detailed conclusions on the surface enrichment of the functional groups and the molecular orientation of the cations and anions is derived. The systems include imidazolium‐based ILs methylated at the C2 position, a phenyl‐functionalized IL, an alkoxysilane‐functionalized IL, halo‐functionalized ILs, thioether‐functionalized ILs, and amine‐functionalized ILs. The results are compared with the results for corresponding non‐functionalized ILs where available. Generally, enrichment of the functional group at the surface is only observed for systems that have very weak interaction between the functional group and the ionic head groups.

Item Type:Article
Divisions:Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:76260

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