New interpretation of the CH stretching vibrations in imidazolium-based ionic liquids
Artikel i vetenskaplig tidskrift, 2009

In ionic liquids composed of alkyl-substituted imidazolium cations and weakly coordinating anions such as bis(trifluoromethanesulfonyl)imide, (CF 3SO2)2N-, the stretching vibrations of the imidazolium CH groups are shown to interact by Fermi resonance with the overtones and the combination of two in-plane ring vibrations. This new assignment, based on isotopic substitutions and anharmonic frequency calculations for gas phase cations, implies that these imidazolium cations do not establish any strong and directional C-H...anion hydrogen bond.

Författare

Patrik Johansson

Chalmers, Teknisk fysik, Kondenserade materiens fysik

Journal of Physical Chemistry A

1089-5639 (ISSN) 1520-5215 (eISSN)

Vol. 113 6419-6421

Ämneskategorier

Fysik

Den kondenserade materiens fysik

DOI

10.1021/jp903160r