Gibb, C.J. orcid.org/0000-0002-8626-4175, Majewska, M., Pociecha, D. et al. (3 more authors) (2024) Liquid crystal dimers and the twist‐bend phases: non‐symmetric dimers consisting of mesogenic units of differing lengths. ChemPhysChem. e202300848. ISSN 1439-4235
Abstract
The syntheses and characterisation of the 4‑[{[4‑({n‑[4‑(4 cyanophenyl)phenyl]‑n‑yl}oxy)phenyl]-methylidene}amino]phenyl-4-alkoxybenzoates (CBnOIBeOm) are reported with n= 8 and 10 and m= 1-10. The two series display fascinating liquid crystal polymorphism. All twenty reported homologues display enantiotropic nematic (N) phase at high temperature. When the length of the spacer (n) is greater than that of the terminal chain (m), the twist-bend nematic (NTB) phase is observed at temperatures below the N phase. As the length of the terminal chain is increased and extends beyond the length of the spacer up to three smectic phases are observed on cooling the N phase. One of these smectic phases has been assigned as the rare twist-bend smectic C subphase, the SmCTB‑α phase. In all the smectic phases, a monolayer packing arrangement is seen, and this is attributed to the anti-parallel associations of the like mesogenic units.
Metadata
Authors/Creators: |
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Keywords: | Liquid crystal dimers Heliconical twist-bend smectic C phase Twist-bend nematic phase Structure-property relationships |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 05 Feb 2024 11:08 |
Last Modified: | 05 Feb 2024 11:08 |
Published Version: | https://chemistry-europe.onlinelibrary.wiley.com/d... |
Status: | Published online |
Publisher: | Wiley |
Identification Number: | https://doi.org/10.1002/cphc.202300848 |
Related URLs: |
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