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Determination of aqueous inclusion complexation constants and stoichiometry of alkyl(methyl)‐methylimidazolium‐based ionic liquid cations and neutral cyclodextrins by affinity capillary electrophoresis
Author(s) -
François Yannis,
Varenne Anne,
SirieixPlenet Juliette,
Gareil Pierre
Publication year - 2007
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200600386
Subject(s) - stoichiometry , chemistry , ionic liquid , capillary electrophoresis , aqueous solution , alkyl , ionic strength , ionic bonding , inorganic chemistry , chromatography , ion , organic chemistry , catalysis
Affinity CE (ACE) method was developed to characterize the complex formation between seven alkyl(methyl)methylimidazolium‐based ionic liquid (IL) cations and eight neutral cyclodextrins (CD). The effective mobility data of the IL cations were processed according to classical nonlinear and linear treatments to obtain the complex stoichiometry and formation constant K . The majority of systems followed a 1:1 complexation stoichiometry model but in four cases a 1:2 stoichiometry was better satisfied. The K values obtained for each IL were compared to elucidate the main influences of IL and CD nature. The availability of these data should lend support to various application areas, including the screening and tailoring of new interactions in the solution for CE.