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Raman spectroscopic study of the vapor phase of 1-methylimidazolium ethanoate, a protic ionic liquid.

Rolf W Berg, José N Canongia Lopes, Rui Ferreira, Luís Paulo N Rebelo, Kenneth R Seddon, and Alina A Tomaszowska

Audio, Transactions of the IRE Profes... 114(40):10834-41 (2010) PMID 20857986

The gas phase over the ionic liquid 1-methylimidazolium ethanoate, [Hmim][O(2)CCH(3)], was studied by means of Raman spectroscopy. Raman spectra are presented, the species in the gas phase are identified, and their bands are assigned. The results are interpreted using ab initio quantum mechanical calculations that also predict vibrational spectra. The obtained data reinforce a previous interpretation, based on FT-ICR mass spectrometric data, that the vapor phase over [Hmim][O(2)CCH(3)] consists predominantly of two neutral molecules, monomeric ethanoic acid and 1-methylimidazole.

DOI: 10.1021/jp1050639
Version: za2963e q8za9 q8zb6 q8zcf q8zd4 q8ze1 q8zf1 q8zg1

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