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

Kolbeck C, Niedermaier I, Deyko A, Lovelock K, Taccardi N, Wei W, Wasserscheid P, Maier F, Steinrück HP (2014)

Publication Type: Journal article, Original article

Publication year: 2014

Journal

Chemistry - A European Journal Wiley

Original Authors: Kolbeck C., Niedermaier I., Deyko A., Lovelock K.R.J., Taccardi N., Wei W., Wasserscheid P., Maier F., Steinrück H.-P.

Publisher: Wiley-VCH Verlag

Book Volume: 20

Pages Range: 3954-3965

Journal Issue: 14

DOI: 10.1002/chem.201304549

Abstract

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. Scratching the surface: The surface behavior of various functionalized ionic liquids (ILs) is studied by angle-resolved X-ray photoelectron spectroscopy and conclusions on surface-enrichment effects and molecular orientation of cations and anions are derived (see figure; Im=imidazolium, Tf=trifluoromethanesulfonyl). Overall, surface enrichment is only observed for functional groups that interact weakly with the ionic head groups. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Authors with CRIS profile

Claudia Kolbeck Lehrstuhl für Physikalische Chemie II Inga Niedermaier Lehrstuhl für Physikalische Chemie II Alexey Deyko Sonderforschungsbereich 953/3 Synthetische Kohlenstoffallotrope Nicola Taccardi Lehrstuhl für Chemische Reaktionstechnik (CRT) Wei Wei Lehrstuhl für Chemische Reaktionstechnik (CRT) Peter Wasserscheid Lehrstuhl für Chemische Reaktionstechnik (CRT) Florian Maier Lehrstuhl für Physikalische Chemie II Hans-Peter Steinrück Lehrstuhl für Physikalische Chemie II

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials (EAM)

How to cite

APA:

Kolbeck, C., Niedermaier, I., Deyko, A., Lovelock, K., Taccardi, N., Wei, W.,... Steinrück, H.-P. (2014). Influence of substituents and functional groups on the surface composition of ionic liquids. Chemistry - A European Journal, 20(14), 3954-3965. https://doi.org/10.1002/chem.201304549

MLA:

Kolbeck, Claudia, et al. "Influence of substituents and functional groups on the surface composition of ionic liquids." Chemistry - A European Journal 20.14 (2014): 3954-3965.

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