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Issue 113, 2015
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The design and investigation of the self-assembly of dimers with two nematic phases

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Abstract

A series of non-symmetric dimers were synthesised containing either cyanobiphenyl or difluoroterphenyl moieties on one side and a range of long, short, bent, polar or apolar mesogens on the other side of the molecules. The dielectric anisotropy of the mesogens was varied systematically. The systems were characterised by differential scanning calorimetry (DSC), optical polarizing microscopy (OPM) and detailed X-ray diffraction (XRD) studies, both in the nematic and the Nx phase. The results are compared and structure–property relationships are discussed. A model for the assembly in the Nx phase is developed discussing Ntb structures, coaxial helices, swiss roll structures and chiral domain formation.

Graphical abstract: The design and investigation of the self-assembly of dimers with two nematic phases

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Supplementary files

Article information


Submitted
05 Sep 2015
Accepted
29 Sep 2015
First published
29 Sep 2015

This article is Open Access

RSC Adv., 2015,5, 93513-93521
Article type
Paper
Author version available

The design and investigation of the self-assembly of dimers with two nematic phases

Z. Ahmed, C. Welch and G. H. Mehl, RSC Adv., 2015, 5, 93513
DOI: 10.1039/C5RA18118F

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