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Int. J. Mol. Sci. 2018, 19(9), 2715;

Effect of Central Longitudinal Dipole Interactions on Chiral Liquid-Crystal Phases

Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
Author to whom correspondence should be addressed.
Received: 17 August 2018 / Revised: 5 September 2018 / Accepted: 6 September 2018 / Published: 11 September 2018
(This article belongs to the Section Materials Science)
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Monte Carlo simulations of chiral liquid-crystals, represented by a simple coarse-grained chiral Gay–Berne model, were performed to investigate the effect of central longitudinal dipole interactions on phase behavior. A systematic analysis of the structural properties and phase behavior of both achiral and chiral systems, with dipole interactions, reveals differing effects; strong dipole interactions enhance the formation of layered structures; however, chiral interactions may prevent the formation of such phases under certain conditions. We also observed a short-ranged smectic structure within the cholesteric phases with strong dipole interactions. This constitutes possible evidence of presmectic ordering and/or the existence of chiral line liquid phases, which have previously been observed in X-ray experiments to occur between the smectic twisted grain boundary and cholesteric phases. These results provide a systematic understanding of how the phase behavior of chiral liquid-crystals changes when alterations are made to the strength of dipole interactions. View Full-Text
Keywords: molecular simulation; liquid crystals; phase transition; chirality; dipole molecular simulation; liquid crystals; phase transition; chirality; dipole

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Nozawa, T.; Brumby, P.E.; Yasuoka, K. Effect of Central Longitudinal Dipole Interactions on Chiral Liquid-Crystal Phases. Int. J. Mol. Sci. 2018, 19, 2715.

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