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Issue 7, 2014
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Changing gears to neutral in a polymorph of one-dimensional arrays of cogwheel-like pairs of molecular rotors

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Abstract

We report on a polymorph (2) of an amphidynamic crystal of molecular rods with two helical 1,4-bis(ethynyl)bicyclo[2.2.2]octane rotators where half of the rod-like molecules appear to be shifted with respect to their closest neighbours. This translation takes cogwheel-like pairs of rotators apart in the lattice in such a way that their motion becomes uncorrelated. This property is to be contrasted with the highly correlated motion found to govern the rotators in a recently-published polymorph 1 of the same material. As with polymorph 1, this motion is shown to take place independently of mutations in the handedness of the rotators and of the ‘mutamer’-induced second harmonic generation.

Graphical abstract: Changing gears to neutral in a polymorph of one-dimensional arrays of cogwheel-like pairs of molecular rotors

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Supplementary files

Article information


Submitted
10 Oct 2013
Accepted
29 Nov 2013
First published
02 Dec 2013

CrystEngComm, 2014,16, 1241-1244
Article type
Communication

Changing gears to neutral in a polymorph of one-dimensional arrays of cogwheel-like pairs of molecular rotors

G. Bastien, C. Lemouchi, M. Allain, P. Wzietek, A. Rodríguez-Fortea, E. Canadell, K. Iliopoulos, D. Gindre, M. Chrysos and P. Batail, CrystEngComm, 2014, 16, 1241
DOI: 10.1039/C3CE42054J

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