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j.jfluchem.2012.01.001.pdf | 866.01 kB | Adobe PDF | 見る/開く |
タイトル: | Effects of alkyl chain length on properties of N-alkyl-N-methylpyrrolidinium fluorohydrogenate ionic liquid crystals |
著者: | Xu, Fei Matsubara, Shohei 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 |
キーワード: | Ionic liquid Liquid crystal Pyrrolidinium Mesophase Conductivity |
発行日: | Mar-2012 |
出版者: | Elsevier B.V. |
誌名: | Journal of Fluorine Chemistry |
巻: | 135 |
開始ページ: | 344 |
終了ページ: | 349 |
抄録: | A series of N-alkyl-N-methylpyrrolidinium fluorohydrogenate salts (CxMPyr(FH)2F, x = 10, 12, 14, 16, and 18) have been characterized by infrared spectroscopy, thermal analysis, polarized optical microscopy, X-ray diffraction, and anisotropic ionic conductivity measurements. Liquid crystalline mesophase with a smectic A interdigitated bilayer structure is observed for the salt with x ≥ 14, showing a fan-like or focal conic texture. Temperature range of the mesophase increases with increase in alkyl chain length (from 26.7 °C for C14MPyr(FH)2F to 90.7 °C for C18MPyr(FH)2F). The layer spacing in the smectic structure monotonously increases with increasing alkyl chain length and decreases with increasing temperature. The liquid crystalline mesophase of C14MPyr(FH)2F exhibits anisotropy in ionic conductivity and the ionic conductivity parallel to the smectic layer is roughly ten times larger than that perpendicular to the smectic layer. |
著作権等: | © 2012 Elsevier B.V. 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。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/154578 |
DOI(出版社版): | 10.1016/j.jfluchem.2012.01.001 |
出現コレクション: | 学術雑誌掲載論文等 |
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