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

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Kolbeck C, Niedermaier I, Deyko A, Lovelock K, Taccardi N, Wei W, Wasserscheid P, Maier F, Steinrück HP
Zeitschrift: Chemistry - A European Journal
Verlag: Wiley-VCH Verlag
Jahr der Veröffentlichung: 2014
Band: 20
Heftnummer: 14
Seitenbereich: 3954-3965
ISSN: 0947-6539
eISSN: 1521-3765


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.



FAU-Autoren / FAU-Herausgeber

Deyko, Alexey Dr.
Sonderforschungsbereich 953/2 Synthetische Kohlenstoffallotrope
Kolbeck, Claudia Dr.
Lehrstuhl für Physikalische Chemie II
Maier, Florian Dr.
Lehrstuhl für Physikalische Chemie II
Niedermaier, Inga
Lehrstuhl für Physikalische Chemie II
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II
Taccardi, Nicola Dr.
Lehrstuhl für Chemische Reaktionstechnik
Wasserscheid, Peter Prof. Dr.
Lehrstuhl für Chemische Reaktionstechnik
Wei, Wei
Lehrstuhl für Chemische Reaktionstechnik


Zitierweisen

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://dx.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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Zuletzt aktualisiert 2018-16-10 um 10:08