期刊
CHEMPHYSCHEM
卷 12, 期 8, 页码 1444-1447出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201100099
关键词
aggregates; ion mobility; ionic liquids; mass spectrometry; supramolecular chemistry
资金
- CNPq
- FINEP
- FAPESP
- INCTCatal.
- INOMAT
- CAPES
- FAPERGS
Travelling-wave ion mobility mass spectrometry was used to measure the intrinsic mobility of a series of gaseous supracation and supra-anion aggregates of several ionic liquids. Close mobilities were observed in a T-wave cell filled with helium at ca. 0.8 mbar for [(DAI)(n+1)(X)(n)](+) (DAI is the 1,3-dialkylimidazolium cation and X is the anion) as compared to the re-spective anions [(DAI)(n)(X)(n+1)](-) for n = 0 to 9. The anomalous behavior reported before in the condensed phase seems therefore to be related to the unique structural organization of pure ionic liquids that provides both polar and non-polar regions with directionality in which the anionic species are more retained than the cationic species in the salt network.
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