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

Ahmed, Z.; Welch, C.; Mehl, G. H.

Authors

Z. Ahmed

C. Welch

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 properties 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.

Journal Article Type Article
Publication Date Sep 29, 2015
Journal RSC advances
Print ISSN 2046-2069
Electronic ISSN 2046-2069
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 5
Issue 113
Pages 93513-93521
Institution Citation Ahmed, Z., Welch, C., & Mehl, G. H. (2015). The design and investigation of the self-assembly of dimers with two nematic phases. RSC advances, 5(113), 93513-93521. https://doi.org/10.1039/c5ra18118f
DOI https://doi.org/10.1039/c5ra18118f
Keywords Soft Condensed Matter
Publisher URL http://pubs.rsc.org/en/content/articlelanding/2015/ra/c5ra18118f#!divAbstract
Copyright Statement This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
Additional Information Copy of article first published in: RSC advances, 2015.

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Copyright Statement
This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.



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