Communication: Molecular gears

The 1H nuclear magnetic resonance spectrum of hexamethylbenzene orientationally ordered in the nematic liquid crystal ZLI-1132 is analysed using covariance matrix adaptation evolution strategy. The spectrum contains over 350 000 lines with many overlapping transitions, from which four independent di...

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Veröffentlicht in:The Journal of chemical physics 2016-09, Vol.145 (9), p.091101-091101
Hauptverfasser: Burnell, E. Elliott, de Lange, Cornelis A., Meerts, W. Leo
Format: Artikel
Sprache:eng
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Zusammenfassung:The 1H nuclear magnetic resonance spectrum of hexamethylbenzene orientationally ordered in the nematic liquid crystal ZLI-1132 is analysed using covariance matrix adaptation evolution strategy. The spectrum contains over 350 000 lines with many overlapping transitions, from which four independent direct dipolar couplings are obtained. The rotations of the six methyl groups appear to be correlated due to mutual steric hindrance. Adjacent methyl groups show counter-rotating or geared motion. Hexamethylbenzene thus behaves as a molecular hexagonal gear.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.4962221