Ion-Association Analysis between Inorganic Anions and Symmetrical Tetraalkylammonium Ions in Aqueous-Acetonitrile Media by Capillary Zone Electrophoresis

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dc.contributor.authorMbuna, Julius
dc.contributor.authorTakayanagi, Toshio
dc.contributor.authorOshima, Mitsuko
dc.contributor.authorMotomizu, Shoji
dc.date.accessioned2016-07-14T20:48:05Z
dc.date.available2016-07-14T20:48:05Z
dc.date.issued2005-08
dc.descriptionFull text can be accessed at https://www.jstage.jst.go.jp/article/bcsj/78/8/78_8_1457/_articleen_US
dc.description.abstractWeak ion-association equilibrium was analyzed in a water-acetonitrile solution at 25 °C by capillary zone electrophoresis using an ordinary silica capillary. The ion associates examined were formed between some inorganic anions and symmetrical tetraalkylammonium ions, where a series of acetonitrile compositions up to 62.2% (m/m) were investigated. Ion-association constants, Kass, were determined by analyzing the changes in the electrophoretic mobility; the Kass values for most of the anions increased up to about 47% (m/m) acetonitrile, beyond which they remained constant, or decreased slightly. The ion-association equilibrium between tetramethylammonium and bromide ions in aqueous-acetonitrile and in aqueous-ethanol media were compared through the Gibbs free energy of transfer, which revealed that the extent of the equilibrium in aqueous-acetonitrile media is dependent mainly on the increasing instability of Br-. On the other hand, those in aqueous-ethanol media depend on the instabilities of both tetramethylammonium and bromide ions.en_US
dc.identifier.citationMbuna, J., Takayanagi, T., Oshima, M. and Motomizu, S., 2005. Ion-association analysis between inorganic anions and symmetrical tetraalkylammonium ions in aqueous-acetonitrile media by capillary zone electrophoresis. Bulletin of the Chemical Society of Japan, 78(8), pp.1457-1462.en_US
dc.identifier.doi10.1246/bcsj.78.1457
dc.identifier.urihttp://hdl.handle.net/20.500.11810/3197
dc.language.isoenen_US
dc.titleIon-Association Analysis between Inorganic Anions and Symmetrical Tetraalkylammonium Ions in Aqueous-Acetonitrile Media by Capillary Zone Electrophoresisen_US
dc.typeJournal Articleen_US
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