Differentiating p Interactions by Constructing Concave/Convex Surfaces Using a Bucky Bowl Molecule, Corannulene in Liquid Chromatography

Eisuke Kanao, Takuya Kubo, Toyohiro Naito, Takatoshi Matsumoto, Tomoharu Sano, Mingdi Yan, Koji Otsuka

研究成果: Contribution to journalArticle査読

5 被引用数 (Scopus)

抄録

Convex-concave p conjugated surfaces in hemispherical bucky bowl such as corannulene (Crn) have shown increasing utility in constructing self-assembled new functional materials owing to its unique p electrons and strong dipole. Here, we investigate these specific molecular recognitions on Crn by developing new silica-monolithic capillary columns modified with Crn and evaluating their performance in the separation of different aromatic compounds by liquid chromatography (LC). We synthesized two Crn derivatives and conjugated them onto the surface of a silica monolith. The first Crn derivative was edge functionalized, which can undergo free inversion of a convex-concave surface. The second Crn derivative was synthesized by modifying the spoke of Crn, which suppresses the convex-concave inversion. Results of LC suggest that each surface showed different shape recognition based on p interaction. Furthermore, the concave surface of Crn showed strong CH-p interaction with a planar molecule, coronene, demonstrated by the shifts of the 1 H NMR signals of both Crn and coronene resulting from the multiple interactions between Crn and p electrons in coronene. These results clearly demonstrated the presence of CH-p interactions at multiple points, and the role of shape recognition.

本文言語英語
ページ(範囲)2439-2446
ページ数8
ジャーナルAnalytical Chemistry
91
3
DOI
出版ステータス出版済み - 2 5 2019
外部発表はい

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

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