Controlling spontaneous chirality in achiral materials: liquid crystal oligomers and the heliconical twist-bend nematic phase

Magdalena M. Majewska; Ewan Forsyth; Damian Pociecha; Cheng Wang; John M. D. Storey; Corrie T. Imrie; Ewa Gorecka

doi:10.1039/d1cc07012f

Controlling spontaneous chirality in achiral materials: liquid crystal oligomers and the heliconical twist-bend nematic phase

Magdalena M. Majewska^*, Ewan Forsyth, Damian Pociecha, Cheng Wang, John M. D. Storey, Corrie T. Imrie, Ewa Gorecka

^*Corresponding author for this work

School of Chemistry

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

Abstract

Liquid crystal oligomers, namely dimers, trimers and tetramers, consisting of cyanobiphenyl and benzylideneaniline-based mesogenic units connected by either linear or bent alkoxy or alkyl spacers are reported. These materials, although built from achiral molecules, show the spontaneously chiral heliconical twist-bend nematic (NTB) phase. We report the relationships between the shape of the oligomer, and the NTB phase stability, the temperature dependence of the helical pitch length and tilt angle, birefringence, and elastic constants.

Original language	English
Journal	Chemical Communications
Early online date	10 Apr 2022
DOIs	https://doi.org/10.1039/d1cc07012f
Publication status	E-pub ahead of print - 10 Apr 2022

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20220701_Forsyth_d1cc07012f-VoRFinal published version, 2.63 MBLicence: Creative Commons: Attribution Non-Commercial (CC-BY-NC)

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title = "Controlling spontaneous chirality in achiral materials: liquid crystal oligomers and the heliconical twist-bend nematic phase",

abstract = "Liquid crystal oligomers, namely dimers, trimers and tetramers, consisting of cyanobiphenyl and benzylideneaniline-based mesogenic units connected by either linear or bent alkoxy or alkyl spacers are reported. These materials, although built from achiral molecules, show the spontaneously chiral heliconical twist-bend nematic (NTB) phase. We report the relationships between the shape of the oligomer, and the NTB phase stability, the temperature dependence of the helical pitch length and tilt angle, birefringence, and elastic constants.",

author = "Majewska, {Magdalena M.} and Ewan Forsyth and Damian Pociecha and Cheng Wang and Storey, {John M. D.} and Imrie, {Corrie T.} and Ewa Gorecka",

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T1 - Controlling spontaneous chirality in achiral materials: liquid crystal oligomers and the heliconical twist-bend nematic phase

AU - Majewska, Magdalena M.

AU - Forsyth, Ewan

AU - Pociecha, Damian

AU - Wang, Cheng

AU - Storey, John M. D.

AU - Imrie, Corrie T.

AU - Gorecka, Ewa

PY - 2022/4/10

Y1 - 2022/4/10

N2 - Liquid crystal oligomers, namely dimers, trimers and tetramers, consisting of cyanobiphenyl and benzylideneaniline-based mesogenic units connected by either linear or bent alkoxy or alkyl spacers are reported. These materials, although built from achiral molecules, show the spontaneously chiral heliconical twist-bend nematic (NTB) phase. We report the relationships between the shape of the oligomer, and the NTB phase stability, the temperature dependence of the helical pitch length and tilt angle, birefringence, and elastic constants.

AB - Liquid crystal oligomers, namely dimers, trimers and tetramers, consisting of cyanobiphenyl and benzylideneaniline-based mesogenic units connected by either linear or bent alkoxy or alkyl spacers are reported. These materials, although built from achiral molecules, show the spontaneously chiral heliconical twist-bend nematic (NTB) phase. We report the relationships between the shape of the oligomer, and the NTB phase stability, the temperature dependence of the helical pitch length and tilt angle, birefringence, and elastic constants.

UR - http://dx.doi.org/10.1039/d1cc07012f

U2 - 10.1039/d1cc07012f

DO - 10.1039/d1cc07012f

M3 - Article

SN - 1359-7345

JO - Chemical Communications

JF - Chemical Communications

ER -

Controlling spontaneous chirality in achiral materials: liquid crystal oligomers and the heliconical twist-bend nematic phase

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