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タイトル: | Electrochemically stable fluorohydrogenate ionic liquids based on quaternary phosphonium cations |
著者: | Kanematsu, Shunsuke Matsumoto, Kazuhiko https://orcid.org/0000-0002-0770-9210 (unconfirmed) Hagiwara, Rika https://orcid.org/0000-0002-7234-3980 (unconfirmed) |
著者名の別形: | 松本, 一彦 萩原, 理加 |
キーワード: | Ionic liquid Molten salt Quaternary phosphonium salt Fluorohydrogenate electrochemical window Thermal stability |
発行日: | Jun-2009 |
出版者: | Elsevier BV |
誌名: | Electrochemistry Communications |
巻: | 11 |
号: | 6 |
開始ページ: | 1312 |
終了ページ: | 1315 |
抄録: | Fluorohydrogenate ionic liquids of quaternary phosphonium cations, tri-n-butylmethylphosphonium (P4441) fluorohydrogenate, tetra-n-butylphosphonium (P4444) fluorohydrogenate, and tri-n-butyl-n-octylphosphonium (P4448) fluorohydrogenate, have been synthesized by the metatheses of anhydrous hydrogen fluoride and the corresponding phosphonium chloride precursors. All the obtained salts have melting points below room-temperature with a vacuum-stable composition of P₄₄₄ₘ(FH)₂.₃F (m = 1, 4, and 8) and were characterized by density, conductivity, and viscosity measurements. Linear sweep voltammetry with a glassy carbon working electrode shows that the P₄₄₄ₘ(FH)₂.₃Fs have wide electrochemical windows exceeding 5.2 V. In particular, P₄₄₄₁(FH)₂.₃F has an electrochemical window of 6.0 V, which is the widest among fluorohydrogenate ionic liquids reported to date. The thermal stability of these ionic liquids is also improved compared to the salts of N-heterocyclic ammonium cations. |
著作権等: | © 2009. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/261015 |
DOI(出版社版): | 10.1016/j.elecom.2009.05.002 |
出現コレクション: | 学術雑誌掲載論文等 |
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