Mandle, Richard orcid.org/0000-0001-9816-9661 and Goodby, John William (2018) Optically Active Bimesogens Incorporating Branched Central Spacers. RSC Advances. pp. 18542-18548. ISSN 2046-2069
Abstract
In the current fascination with liquid crystalline dimers, bimesogens and oligomers the role of the central spacer in these systems has perhaps been somewhat neglected. In compound 1, a phenyl 4-cyanobenzoate bimesogen, the central spacer incorporates a methyl group at the 2- position and is therefore chiral. The helical twisting power of 1, measured in both 5CB and E7, was found to be 0.36 and 0.35 μm-1 wt%-1 respectively. Compound 1 exhibited a monotropic chiral nematic phase, however no twist-bend modulated phase was observed. We prepared a number of analogues of 1 incorporating different mesogenic units and observe that those with a small aspect ratio are non mesogenic, whereas those with larger aspect ratios variously exhibit chiral nematic, TB, SmC and SmB phases.
Metadata
Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Royal Society of Chemistry 2018 | ||||
Dates: |
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Institution: | The University of York | ||||
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) | ||||
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Depositing User: | Pure (York) | ||||
Date Deposited: | 22 May 2018 14:40 | ||||
Last Modified: | 31 Jan 2024 00:44 | ||||
Published Version: | https://doi.org/10.1039/C8RA02075B | ||||
Status: | Published | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1039/C8RA02075B | ||||
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Filename: 45_RSC_adv_chiral_dimers_2018_print_.pdf
Description: 45 - RSC adv, chiral dimers, 2018 (print)
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