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

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.

SUBMITTER: Matsuno T

PROVIDER: S-EPMC5954156 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

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

Matsuno Taisuke T Nakai Yusuke Y Sato Sota S Maniwa Yutaka Y Isobe Hiroyuki H

Nature communications 20180515 1

Dynamics of molecules in the solid state holds promise for connecting molecular behaviors with properties of bulk materials. Solid-state dynamics of [60]fullerene (C<sub>60</sub>) 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 C<sub>60</sub> liberates the solid-state dynami ...[more]

PMID: 29765050

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