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Intrinsic Mobility of Gaseous Cationic and Anionic Aggregates of Ionic Liquids
Author(s) -
Lalli Priscila M.,
Corilo Yuri E.,
de Sa Gilberto F.,
Daroda Romeu J.,
de Souza Vanderlea,
Souza Gustavo H. M. F.,
Campuzano Iain,
Ebeling Günter,
Dupont Jairton,
Eberlin Marcos N.
Publication year - 2011
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201100099
Subject(s) - cationic polymerization , chemistry , ionic liquid , ion , ionic bonding , polar , mass spectrometry , salt (chemistry) , ion mobility spectrometry , chemical physics , inorganic chemistry , analytical chemistry (journal) , organic chemistry , chromatography , physics , astronomy , catalysis
Travelling‐wave ion mobility mass spectrometry was used to measure the intrinsic mobility of a series of gaseous supra‐cation 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 respective 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.