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Issue 45, 2015

Chiral conglomerates observed for a binary mixture of a nematic liquid crystal trimer and 6OCB

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Abstract

Dark conglomerates of domains with opposite handedness, which are designated as dark conglomerate phases (DC phases), have attracted much attention. After designing an achiral liquid crystal trimer, 4,4′-bis{7-[4-(5-octyloxypyrimidin-2-yl)phenyloxy]heptyloxy}biphenyl (1), which exhibits only a nematic phase, we prepared binary mixtures with some typical rod-like nematic liquid crystals, i.e., 4′-hexyloxy-4-cyanobiphenyl (6OCB), 2-(4-hexyloxyphenyl)-5-pentyloxypyrimidine (PPY), or 4-methyloxyphenyl 4-hexyloxycyclohexanecarboxylate (PCA), and investigated their phase transition behaviour. The binary mixtures containing 55–90 mol% of 6OCB were found to exhibit a nematic phase and a DC phase of chiral domains with opposite handedness. However, neither PPY nor PCA induced such a chiral conglomerate phase in the mixture with trimer 1. We discuss how core–core interactions contribute to produce such a chiral conglomerate phase.

Graphical abstract: Chiral conglomerates observed for a binary mixture of a nematic liquid crystal trimer and 6OCB

Supplementary files

Article information


Submitted
24 Aug 2015
Accepted
15 Sep 2015
First published
15 Sep 2015

Soft Matter, 2015,11, 8827-8833
Article type
Paper
Author version available

Chiral conglomerates observed for a binary mixture of a nematic liquid crystal trimer and 6OCB

A. Yoshizawa, Y. Kato, H. Sasaki, Y. Takanishi and J. Yamamoto, Soft Matter, 2015, 11, 8827 DOI: 10.1039/C5SM02121A

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