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Issue 15, 2019
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Linear symmetric liquid crystal trimers exhibiting supramolecular chiral architectures

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Abstract

We prepared a homologous series of achiral liquid crystal trimers (I-n) in which two phenylpyrimidine units and one biphenyl unit were connected via flexible spacers, and investigated the physical properties. All the trimers possessing odd-numbered methylene spacers exhibited soft crystalline chiral conglomerate phases. X-ray diffraction measurements reveal that they have an intercalated layer structure. On the other hand, the trimers possessing even-numbered spacers showed nematic and smectic C phases. We investigated the surface structures of odd-membered trimers in the soft crystalline phases using scanning electron microscopy. Trimers I-3 and I-5 were found to form cylindrical tubes, whereas trimers I-7, I-9 and I-11 toroidal pits. We discuss the formation of diverse supramolecular architectures in terms of the anisotropy of the chirality transfer.

Graphical abstract: Linear symmetric liquid crystal trimers exhibiting supramolecular chiral architectures

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Supplementary files

Article information


Submitted
04 Feb 2019
Accepted
11 Mar 2019
First published
12 Mar 2019

Soft Matter, 2019,15, 3179-3187
Article type
Paper

Linear symmetric liquid crystal trimers exhibiting supramolecular chiral architectures

R. Oikawa, H. Sasaki, Y. Takanishi, M. Sagisaka, J. Yamamoto and A. Yoshizawa, Soft Matter, 2019, 15, 3179
DOI: 10.1039/C9SM00250B

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