Voltammetry of Ion Transfer across the Electrochemically Polarized Micro Liquid-Liquid Interface between Water and a Room-temperature Ionic Liquid, Tetrahexylammonium Bis(trifluoromethylsulfonyl)imide, Using a Glass Capillary Micropipette
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- TSUJIOKA Norihiro
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
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- IMAKURA Seiichi
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
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- NISHI Naoya
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
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- KAKIUCHI Takashi
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
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Ion transfer across the polarized interface between a room-temperature ionic liquid (RTIL) or room-temperature molten salt, tetrahexylammonium bis(trifluoromethylsulfonyl)imide (THAC1C1N), and water has been studied voltammetrically using a micro liquid-liquid interface formed at the orifice of a glass capillary micropipette. A small current of nanoampere level circumvents the problem of the iR drop in the viscous ionic liquid phase. Voltammograms for the transfer of moderately hydrophilic ions, such as BF4- and ClO4-, from the aqueous phase in the capillary to the bulk of THAC1C1N in which the capillary is submerged, show steady-state characteristics in that the current does not depend on the scan rate up to a few hundred millivolt per second, and the plateau in the limiting current region is proportional to the bulk concentration of analyte ions. Owing to the steady-state current, which is presumably ascribed to a noncylindrical geometry of the capillary tip, the relative magnitude of the hydrophobicity, or the affnity to the RTIL, of a series of ions can be determined from the half-wave potentials of voltammograms.
収録刊行物
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- Analytical Sciences
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Analytical Sciences 22 (5), 667-671, 2006
社団法人 日本分析化学会
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詳細情報 詳細情報について
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- CRID
- 1390001204255595648
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- NII論文ID
- 130004441267
- 10017497426
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- NII書誌ID
- AA10500785
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- COI
- 1:CAS:528:DC%2BD28XltVejsrw%3D
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- ISSN
- 13482246
- 09106340
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- NDL書誌ID
- 7899989
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- PubMed
- 16770042
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可