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
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © The Royal Society of Chemistry 2018 |
Dates: |
|
Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) |
Funding Information: | Funder Grant number EPSRC EP/M020584/1 |
Depositing User: | Pure (York) |
Date Deposited: | 22 May 2018 14:40 |
Last Modified: | 21 Dec 2024 00:16 |
Published Version: | https://doi.org/10.1039/C8RA02075B |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1039/C8RA02075B |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:131195 |
Download
Filename: 45_RSC_adv_chiral_dimers_2018_print_.pdf
Description: 45 - RSC adv, chiral dimers, 2018 (print)
Licence: CC-BY 2.5