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Highly Reversible Redox of a Viologen-Headed Two-Chain Amphiphile Monolayer on Graphite Electrodes: A Voltammetric and Electroreflectance Study
http://hdl.handle.net/10069/0002003484
http://hdl.handle.net/10069/00020034847b087113-10dc-41e4-abf7-096299e186f7
| 名前 / ファイル | ライセンス | アクション |
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JPCC129_20339.pdf (2.1 MB)
Download is available from 2026/10/29.
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| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||||
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| 公開日 | 2025-11-28 | |||||||||||
| タイトル | ||||||||||||
| タイトル | Highly Reversible Redox of a Viologen-Headed Two-Chain Amphiphile Monolayer on Graphite Electrodes: A Voltammetric and Electroreflectance Study | |||||||||||
| 言語 | en | |||||||||||
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| 言語 | eng | |||||||||||
| 資源タイプ | ||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||
| 資源タイプ | journal article | |||||||||||
| 著者 |
Sagara, Takamasa
× Sagara, Takamasa
× Ouchi, Misato
× Utsunomiya, Mitsugu
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | A lipid-like dialkyl surfactant viologen bearing branched two alkyl chains at one side of 4,4′-bipyridinium moiety, viologen-headed two-chain amphiphile (VTA), was newly synthesized. Unlike a two-chain viologen with each chain attached to opposite sides of the moiety, the entire VTA molecular shape can be approximated by an imaginary cylinder. This facilitates the formation of an ordered planar monolayer on the electrode surface. The completely water-insoluble bis-hexafluorophosphate salt of VTA was spreadable as a Langmuir layer at a gas/KCl aqueous solution interface to achieve an equilibrium spreading pressure (ESP), 44 mN m–1, at room temperature. Graphite electrodes were touched horizontally to the Langmuir layer at its ESP from the gas phase. In KCl aqueous solution, the monolayer-modified electrodes exhibited highly reversible thin-layer electrochemistry of the one-electron transfer redox of viologen. The two-dimensional density of the viologen moieties corresponded to their close-packed, upright orientation on the basal-plane pyrolytic graphite (BPG) electrode. However, electroreflectance spectroscopy revealed that the dimerization of viologens upon one-electron reduction is limited. Molecular orientation and electron transfer kinetics of the VTA monolayer at a highly oriented pyrolytic graphite electrode were different from those at the BPG electrode. It was impossible to transfer the Langmuir layer onto a Au electrode surface through horizontal touching. A thick cast film of VTA on a BPG electrode also exhibited high redox activity associated with diffusional kinetic control. The effect of adding poly(styrenesulfonate) on the redox behavior was also examined. Basic characteristics of the modified electrode as a robust redox platform are discussed. | |||||||||||
| 言語 | en | |||||||||||
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| 内容記述タイプ | Other | |||||||||||
| 内容記述 | 登録バージョン以降にタイトル変更あり | |||||||||||
| 言語 | ja | |||||||||||
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| 内容記述タイプ | Other | |||||||||||
| 内容記述 | Changing the title upon publication | |||||||||||
| 言語 | en | |||||||||||
| 書誌情報 |
en : The Journal of Physical Chemistry C 巻 129, 号 45, p. 20339-20352, 発行日 2025-10-29 |
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| 出版者 | ||||||||||||
| 出版者 | American Chemical Society | |||||||||||
| 言語 | en | |||||||||||
| ISSN | ||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||
| 収録物識別子 | 1932-7447 | |||||||||||
| DOI | ||||||||||||
| 関連タイプ | isVersionOf | |||||||||||
| 識別子タイプ | DOI | |||||||||||
| 関連識別子 | https://doi.org/10.1021/acs.jpcc.5c03996 | |||||||||||
| 権利 | ||||||||||||
| 権利情報 | © 2025 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry C, copyright © 2025 after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.5c03996 | |||||||||||
| 言語 | en | |||||||||||
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| 出版タイプ | AM | |||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||||||||
| 引用 | ||||||||||||
| 内容記述タイプ | Other | |||||||||||
| 内容記述 | Journal of Physical Chemistry C, 129(45), pp.20339-20352; 2025 | |||||||||||
| 言語 | en | |||||||||||
