Molecular fluctuation of chiral and achiral smectic liquid crystals studied by super(13)C-NMR spectroscopy

We studied the molecular dynamics of chiral and achiral smectic liquid crystals by solid-state super(13)C nuclear magnetic resonance ( super(13)C-NMR) spectroscopy with a Larmor frequency of 100 MHz. The chiral and achiral smectic liquid crystals used were S-4-(1-methylhexyloxycarbonyl)phenyl 4'...

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Bibliographic Details
Published in:Ferroelectrics 2016-05, Vol.495 (1), p.1-16
Main Authors: Hiraoka, Kazuyuki, Kawasaki, Ryota, Yamamoto, Manami, Tsuyuki, Ryota, Niikura, Kenta, Komiya, Ken-ichiro
Format: Article
Language:English
Subjects:
Carbon
Chirality
Fluctuation
Molecular dynamics
Rotational
Smectic liquid crystals
Spectroscopy
Spin-lattice relaxation
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Summary:We studied the molecular dynamics of chiral and achiral smectic liquid crystals by solid-state super(13)C nuclear magnetic resonance ( super(13)C-NMR) spectroscopy with a Larmor frequency of 100 MHz. The chiral and achiral smectic liquid crystals used were S-4-(1-methylhexyloxycarbonyl)phenyl 4'-octyloxybiphenyl-4-carboxylate and 4-(hexyloxycarbonyl)phenyl 4'-octyloxybiphenyl-4-carboxylate, respectively. The peak width and the spin-lattice relaxation time were measured to investigate the effect of chirality on the molecular dynamics. The super(13)C-NMR study revealed that introducing chirality, namely, the introduction of a (-CH sub(3)) group to the C23 carbon, affects the intramolecular correlation between the mobility of the carbon and the rotational motion of the aromatic core.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150193.2016.1136724