Concyclic CH-π arrays for single-axis rotations of a bowl in a tube

Taisuke Matsuno, Masahiro Fujita, Kengo Fukunaga, Sota Sato and Hiroyuki Isobe ()
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Taisuke Matsuno: The University of Tokyo
Masahiro Fujita: Tohoku University
Kengo Fukunaga: The University of Tokyo
Sota Sato: The University of Tokyo
Hiroyuki Isobe: The University of Tokyo

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract The hydrogen bond is undoubtedly one of the most important non-covalent interactions. Among the several types of the hydrogen bonds, the CH–π interaction is a relatively new notion that is being recognised in chemistry and biology. Although the CH–π hydrogen bond and conventional hydrogen bonds share common features such as directionality, this weak interaction has played a secondary role in molecular recognition. In this study, we have devised a host–guest complex that is assembled solely by the CH–π hydrogen bonds. Multivalent interactions of a bowl-shaped hydrocarbon with its peripheral hydrogen atoms are made possible via CH–π hydrogen bonds by adopting a tubular hydrocarbon as a host for their enthalpy-driven complexation. Concyclic arrays of weak hydrogen bonds further allow dynamic rotational motions of the guest in the host. Solid-state analysis with crystallographic and spectroscopic methods reveal a single-axis rotation of the bowl in the tube.

Date: 2018
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DOI: 10.1038/s41467-018-06270-6

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