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Spectroscopy and transitions

Pressure-induced Raman spectral changes of N,N,diethyl-N-methyl-N-(2-methoxyethyl) ammonium tetrafluoroborate

, , , &
Pages 536-541 | Received 31 Aug 2009, Published online: 15 Dec 2009
 

Abstract

We have measured Raman spectral changes in one of the aliphatic series of ionic liquids, N,N,diethyl-N-methyl-N-(2-methoxyethyl) ammonium tetrafluoroborate, [DEME][BF4], under high pressure. Although the [DEME] cation has mainly two stable conformers of TG +tg + t and TG +g + g t in the liquid state, the population of the minor conformer, i.e. TG +g + g t, decreases with increasing pressure. The difference in the partial molar volume between the two conformers was determined from the pressure dependence of the relative Raman intensity ratio.

Acknowledgments

We appreciate Professor T. Arai and Dr M. Aono for their helpful discussions.

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