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タイトル: | Cesium fluorohydrogenate, Cs(FH)₂.₃F |
著者: | Matsumoto, Kazuhiko https://orcid.org/0000-0002-0770-9210 (unconfirmed) Ohtsuki, Junya Hagiwara, Rika https://orcid.org/0000-0002-7234-3980 (unconfirmed) Matsubara, Seijiro https://orcid.org/0000-0001-8484-4574 (unconfirmed) |
著者名の別形: | 松本, 一彦 萩原, 理加 松原, 誠二郎 |
キーワード: | Ionic liquid Molten salt Cesium fluoride Hydrogen fluoride Fluorohydrogenate |
発行日: | Oct-2006 |
出版者: | Elsevier BV |
誌名: | Journal of Fluorine Chemistry |
巻: | 127 |
号: | 10 |
開始ページ: | 1339 |
終了ページ: | 1343 |
抄録: | Cs(FH)₂.₃F is a liquid salt exhibiting a low viscosity of 20.1 cP and a high conductivity of 86.3 mS cm⁻¹ at 25 °C, in spite of the relatively high melting point (16.9 °C). The high density of 2.82 g cmÄ⁻³ at the liquid state is due to the heavy atomic weight and small size of cesium atom compared to the organic cations of general ionic liquids. The infrared spectroscopy indicates that this salt contains (FH)₂F⁻ as a main anionic species. The other anionic species such as (FH)₃F⁻ found in the cases of other M⁺(HF)₂.₃F (M = a univalent organic cation) ionic liquid salts is not detected, suggesting its small abundance as well as the presence of neutral HF in the form of molecular and/or oligomers. The result of ¹H NMR also suggests that the anions exchange HF between them. These observations coincide with the experimental result that Cs(FH)₂.₃F acts as an acid against general ionic liquid fluorohydrogenates such as EMIm(FH)₂.₃F (EMIm = 1-ethyl-3-methylimidazolium) to lose HF and give Cs(FH)₂F precipitate. |
著作権等: | © 2006. 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/2433/254683 |
DOI(出版社版): | 10.1016/j.jfluchem.2006.04.009 |
出現コレクション: | 学術雑誌掲載論文等 |
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