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Effect of the linking unit on the twist-bend nematic phase in liquid crystal dimers: a comparative study of two homologous series of methylene- and ether-linked dimers

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Effect of the linking unit on the twist-bend nematic phase in liquid crystal dimers : a comparative study of two homologous series of methylene- and ether-linked dimers. / Archbold, Craig T.; Andrews, Jessica L.; Mandle, Richard J.; Cowling, Stephen J.; Goodby, John W.

In: LIQUID CRYSTALS, Vol. 44, No. 1, 02.01.2017, p. 84-92.

Research output: Contribution to journalArticlepeer-review

Harvard

Archbold, CT, Andrews, JL, Mandle, RJ, Cowling, SJ & Goodby, JW 2017, 'Effect of the linking unit on the twist-bend nematic phase in liquid crystal dimers: a comparative study of two homologous series of methylene- and ether-linked dimers', LIQUID CRYSTALS, vol. 44, no. 1, pp. 84-92. https://doi.org/10.1080/02678292.2016.1240247

APA

Archbold, C. T., Andrews, J. L., Mandle, R. J., Cowling, S. J., & Goodby, J. W. (2017). Effect of the linking unit on the twist-bend nematic phase in liquid crystal dimers: a comparative study of two homologous series of methylene- and ether-linked dimers. LIQUID CRYSTALS, 44(1), 84-92. https://doi.org/10.1080/02678292.2016.1240247

Vancouver

Archbold CT, Andrews JL, Mandle RJ, Cowling SJ, Goodby JW. Effect of the linking unit on the twist-bend nematic phase in liquid crystal dimers: a comparative study of two homologous series of methylene- and ether-linked dimers. LIQUID CRYSTALS. 2017 Jan 2;44(1):84-92. https://doi.org/10.1080/02678292.2016.1240247

Author

Archbold, Craig T. ; Andrews, Jessica L. ; Mandle, Richard J. ; Cowling, Stephen J. ; Goodby, John W. / Effect of the linking unit on the twist-bend nematic phase in liquid crystal dimers : a comparative study of two homologous series of methylene- and ether-linked dimers. In: LIQUID CRYSTALS. 2017 ; Vol. 44, No. 1. pp. 84-92.

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@article{1c75a3f0d6844640844f8d4d70bddee2,
title = "Effect of the linking unit on the twist-bend nematic phase in liquid crystal dimers: a comparative study of two homologous series of methylene- and ether-linked dimers",
abstract = "Two series of bimesogens with phenyl benzoate mesogenic units were prepared: one series having a heptamethylene spacer and the other a pentamethylene spacer with two ether-linking groups. These materials were prepared to provide experimental backing to the widely held hypothesis that methylene-linked bimesogens are more likely to exhibit the twist-bend nematic mesophase than their ether-linked counterparts. Several of the methylene-linked materials exhibited nematic and NTB mesophases, whereas the analogous ether-linked materials gave only nematic phases albeit with significantly higher clearing points. Virtual N–NTB transition temperatures for both methylene- and ether-linked bimesogens were extrapolated by constructing binary phase diagrams with the well-studied twist-bend material CB9CB. Contrary to our expectations these virtual transition temperatures were in most cases higher for the ether-linked bimesogens than in the analogous methylene compounds, this runs counter to reported theories and hypotheses that the incorporation of ether-linking groups should serve to destabilise the NTB phase.",
keywords = "bimesogens, Liquid crystals, twist-bend nematic",
author = "Archbold, {Craig T.} and Andrews, {Jessica L.} and Mandle, {Richard J.} and Cowling, {Stephen J.} and Goodby, {John W.}",
note = "{\textcopyright} 2016 Informa UK Limited, trading as Taylor & Francis Group. This is an author-produced version of the published paper. Uploaded in accordance with the publisher{\textquoteright}s self-archiving policy. Further copying may not be permitted; contact the publisher for details",
year = "2017",
month = jan,
day = "2",
doi = "10.1080/02678292.2016.1240247",
language = "English",
volume = "44",
pages = "84--92",
journal = "LIQUID CRYSTALS",
issn = "0267-8292",
publisher = "Taylor and Francis Ltd.",
number = "1",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Effect of the linking unit on the twist-bend nematic phase in liquid crystal dimers

T2 - a comparative study of two homologous series of methylene- and ether-linked dimers

AU - Archbold, Craig T.

AU - Andrews, Jessica L.

AU - Mandle, Richard J.

AU - Cowling, Stephen J.

AU - Goodby, John W.

N1 - © 2016 Informa UK Limited, trading as Taylor & Francis Group. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

PY - 2017/1/2

Y1 - 2017/1/2

N2 - Two series of bimesogens with phenyl benzoate mesogenic units were prepared: one series having a heptamethylene spacer and the other a pentamethylene spacer with two ether-linking groups. These materials were prepared to provide experimental backing to the widely held hypothesis that methylene-linked bimesogens are more likely to exhibit the twist-bend nematic mesophase than their ether-linked counterparts. Several of the methylene-linked materials exhibited nematic and NTB mesophases, whereas the analogous ether-linked materials gave only nematic phases albeit with significantly higher clearing points. Virtual N–NTB transition temperatures for both methylene- and ether-linked bimesogens were extrapolated by constructing binary phase diagrams with the well-studied twist-bend material CB9CB. Contrary to our expectations these virtual transition temperatures were in most cases higher for the ether-linked bimesogens than in the analogous methylene compounds, this runs counter to reported theories and hypotheses that the incorporation of ether-linking groups should serve to destabilise the NTB phase.

AB - Two series of bimesogens with phenyl benzoate mesogenic units were prepared: one series having a heptamethylene spacer and the other a pentamethylene spacer with two ether-linking groups. These materials were prepared to provide experimental backing to the widely held hypothesis that methylene-linked bimesogens are more likely to exhibit the twist-bend nematic mesophase than their ether-linked counterparts. Several of the methylene-linked materials exhibited nematic and NTB mesophases, whereas the analogous ether-linked materials gave only nematic phases albeit with significantly higher clearing points. Virtual N–NTB transition temperatures for both methylene- and ether-linked bimesogens were extrapolated by constructing binary phase diagrams with the well-studied twist-bend material CB9CB. Contrary to our expectations these virtual transition temperatures were in most cases higher for the ether-linked bimesogens than in the analogous methylene compounds, this runs counter to reported theories and hypotheses that the incorporation of ether-linking groups should serve to destabilise the NTB phase.

KW - bimesogens

KW - Liquid crystals

KW - twist-bend nematic

UR - http://www.scopus.com/inward/record.url?scp=84990223172&partnerID=8YFLogxK

U2 - 10.1080/02678292.2016.1240247

DO - 10.1080/02678292.2016.1240247

M3 - Article

AN - SCOPUS:84990223172

VL - 44

SP - 84

EP - 92

JO - LIQUID CRYSTALS

JF - LIQUID CRYSTALS

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