Ratchet-free solid-state inertial rotation of a guest ball in a tight tubular host

Taisuke Matsuno, Yusuke Nakai, Sota Sato, Yutaka Maniwa and Hiroyuki Isobe ()
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Taisuke Matsuno: The University of Tokyo
Yusuke Nakai: Tokyo Metropolitan University
Sota Sato: The University of Tokyo
Yutaka Maniwa: Tokyo Metropolitan University
Hiroyuki Isobe: The University of Tokyo

Nature Communications, 2018, vol. 9, issue 1, 1-5

Abstract: Abstract Dynamics of molecules in the solid state holds promise for connecting molecular behaviors with properties of bulk materials. Solid-state dynamics of [60]fullerene (C60) is controlled by intimate intermolecular contacts and results in restricted motions of a ratchet phase at low temperatures. Manipulation of the solid-state dynamics of fullerene molecules is thus an interesting yet challenging problem. Here we show that a tubular host for C60 liberates the solid-state dynamics of the guest from the motional restrictions. Although the intermolecular contacts between the host and C60 were present to enable a tight association with a large energy gain of –14 kcal mol–1, the dynamic rotations of C60 were simultaneously enabled by a small energy barrier of +2 kcal mol–1 for the reorientation. The solid-state rotational motions reached a non-Brownian, inertial regime with an extremely rapid rotational frequency of 213 GHz at 335 K.

Date: 2018
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DOI: 10.1038/s41467-018-04325-2

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