Research output: Contribution to journal › Article › peer-review
3.98 MB, Word document
Journal | LIQUID CRYSTALS |
---|---|
Date | Accepted/In press - 20 Sep 2016 |
Date | E-pub ahead of print - 3 Oct 2016 |
Date | Published (current) - 2 Jan 2017 |
Issue number | 1 |
Volume | 44 |
Number of pages | 9 |
Pages (from-to) | 84-92 |
Early online date | 3/10/16 |
Original language | English |
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.
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Research output: Contribution to journal › Article › peer-review
Project: Research project (funded) › Research
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