Nonpolar-to-Polar Phase Transition of a Chiral Ionic Plastic Crystal and Switch of the Rotation Symmetry

Masaya Matsuki, Teppei Yamada, Nobuhiro Yasuda, Shun Dekura, Hiroshi Kitagawa, Nobuo Kimizuka

研究成果: ジャーナルへの寄稿学術誌査読

22 被引用数 (Scopus)

抄録

The synthesis of a new ionic plastic crystal, tetraethylammonium-d20 d-10-camphorsulfonate, is reported. The crystal has three solid phases, the structures of which were determined by single-crystal X-ray diffraction (XRD). XRD analysis revealed a phase transition from nonpolar space group P21212 to polar space group P21 with increasing temperature. The dynamics of the d-10-camphorsulfonate anion and the tetraethylammonium-d20 cation was investigated by variable-temperature 1H and 2H solid-state NMR spectroscopy. The anion showed swing motion in high-temperature phases, which is in good agreement with the disorder observed in XRD analysis. The cation showed uniaxial rotation even in the low-temperature phase. The rotation axis of the tetrahedral structure showed a transition from the two-fold axis to the three-fold axis with the phase transition.

本文言語英語
ページ(範囲)291-297
ページ数7
ジャーナルJournal of the American Chemical Society
140
1
DOI
出版ステータス出版済み - 1月 10 2018

!!!All Science Journal Classification (ASJC) codes

  • 触媒
  • 化学 (全般)
  • 生化学
  • コロイド化学および表面化学

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