Unusual mesomorphic behaviour of silyloxy-linked chiral bimesogens

Susan Sia; Isabel M. Saez; Stephen J. Cowling; Laurence C. Abbott; John N. Moore; John W. Goodby

doi:10.1080/02678292.2023.2196541

Unusual mesomorphic behaviour of silyloxy-linked chiral bimesogens

Susan Sia, Isabel M. Saez, Stephen J. Cowling, Laurence C. Abbott, John N. Moore, John W. Goodby^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

In this article, we report on the synthesis of chiral bimesogens that possess silyloxy central linking groups. On first examination of the mesomorphic properties of the materials by X-ray diffraction and electrical field studies we came to the conclusion that the materials exhibit ferroelectric and antiferroelectric smectic C* phase behaviour. However, detailed investigations of the bimesogens indicated that the phases were not conventional smectics, but in addition strange phases that exhibited natural helical filaments on cooling from the isotropic liquid were formed. Indications are that these phases are possibly related to twist-bend structures or in-plane, modulated bent-core phases.

Original language	English
Number of pages	21
Journal	LIQUID CRYSTALS
Early online date	10 Apr 2023
DOIs	https://doi.org/10.1080/02678292.2023.2196541
Publication status	E-pub ahead of print - 10 Apr 2023

Bibliographical note

Keywords

antiferroelectric
bent-core
bimesogens
Ferroelectric
nanostructuring
twist-bend phase

Access to Document

10.1080/02678292.2023.2196541Licence: CC BY

Unusual mesomorphic behaviour of silyloxy linked chiral bimesogens
© 2023 The Author(s).
Final published version, 20.6 MBLicence: CC BY

Cite this

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title = "Unusual mesomorphic behaviour of silyloxy-linked chiral bimesogens",

abstract = "In this article, we report on the synthesis of chiral bimesogens that possess silyloxy central linking groups. On first examination of the mesomorphic properties of the materials by X-ray diffraction and electrical field studies we came to the conclusion that the materials exhibit ferroelectric and antiferroelectric smectic C* phase behaviour. However, detailed investigations of the bimesogens indicated that the phases were not conventional smectics, but in addition strange phases that exhibited natural helical filaments on cooling from the isotropic liquid were formed. Indications are that these phases are possibly related to twist-bend structures or in-plane, modulated bent-core phases.",

keywords = "antiferroelectric, bent-core, bimesogens, Ferroelectric, nanostructuring, twist-bend phase",

author = "Susan Sia and Saez, {Isabel M.} and Cowling, {Stephen J.} and Abbott, {Laurence C.} and Moore, {John N.} and Goodby, {John W.}",

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AU - Sia, Susan

AU - Saez, Isabel M.

AU - Cowling, Stephen J.

AU - Abbott, Laurence C.

AU - Moore, John N.

AU - Goodby, John W.

PY - 2023/4/10

Y1 - 2023/4/10

N2 - In this article, we report on the synthesis of chiral bimesogens that possess silyloxy central linking groups. On first examination of the mesomorphic properties of the materials by X-ray diffraction and electrical field studies we came to the conclusion that the materials exhibit ferroelectric and antiferroelectric smectic C* phase behaviour. However, detailed investigations of the bimesogens indicated that the phases were not conventional smectics, but in addition strange phases that exhibited natural helical filaments on cooling from the isotropic liquid were formed. Indications are that these phases are possibly related to twist-bend structures or in-plane, modulated bent-core phases.

AB - In this article, we report on the synthesis of chiral bimesogens that possess silyloxy central linking groups. On first examination of the mesomorphic properties of the materials by X-ray diffraction and electrical field studies we came to the conclusion that the materials exhibit ferroelectric and antiferroelectric smectic C* phase behaviour. However, detailed investigations of the bimesogens indicated that the phases were not conventional smectics, but in addition strange phases that exhibited natural helical filaments on cooling from the isotropic liquid were formed. Indications are that these phases are possibly related to twist-bend structures or in-plane, modulated bent-core phases.

KW - antiferroelectric

KW - bent-core

KW - bimesogens

KW - Ferroelectric

KW - nanostructuring

KW - twist-bend phase

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DO - 10.1080/02678292.2023.2196541

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JO - LIQUID CRYSTALS

JF - LIQUID CRYSTALS

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Unusual mesomorphic behaviour of silyloxy-linked chiral bimesogens

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Nanoscale Engineering of Dyes for Liquid Crystal Dyes in Device Applications

Core Capability

Self-Organisation and Self-Assembly in Aliphatic Based Liquid Crystals

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Unusual mesomorphic behaviour of silyloxy-linked chiral bimesogens

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Projects

Nanoscale Engineering of Dyes for Liquid Crystal Dyes in Device Applications

Core Capability

Self-Organisation and Self-Assembly in Aliphatic Based Liquid Crystals

Datasets

MD input files and data from the paper "Unusual mesomorphic behaviour of silyloxy-linked chiral bimesogens"

Cite this