Stabilised columnar mesophases formed by 1 : 1 mixtures of hexaalkoxytriphenylenes with a hexaphenyltriphenylene-based polymer

McLaren, Sholto R.; Tate, Daniel J.; Lozman, Owen R.; Mehl, Georg H.; Bushby, Richard J.

Abstract

The synthesis is reported for a main chain polymer in which the repeat units are 2,3,6,7,10,11-hexaphenyltriphenylene moieties linked through flexible dodecyl chains. In compositions with a series of 2,3,6,7,10,11-hexakis(alkoxy)triphenylenes (HATn) this new polymer forms stable hexagonal columnar liquid crystal phases. These are investigated in detail using optical polarised microscopy (OPM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD). In these mixtures, suppression of crystallisation and enhancement of the clearing temperatures leads to very wide liquid crystal ranges: much wider than those for the HATn materials on their own. For the longer chain HATn compounds (n = 12–16) a columnar rectangular phase is also observed. The enhancement of the liquid crystal phase range is attributed to stabilising complementary polytopic interactions between the planar aromatic moieties.

Citation

McLaren, S. R., Tate, D. J., Lozman, O. R., Mehl, G. H., & Bushby, R. J. (2015). Stabilised columnar mesophases formed by 1 : 1 mixtures of hexaalkoxytriphenylenes with a hexaphenyltriphenylene-based polymer. Journal of Materials Chemistry C, 3(22), 5754-5763. https://doi.org/10.1039/c5tc00661a

• Journal Article Type: Article
• Acceptance Date: May 7, 2015
• Online Publication Date: May 8, 2015
• Publication Date: Jun 14, 2015
• Deposit Date: Sep 2, 2015
• Publicly Available Date: Nov 23, 2017
• Journal: Journal of materials chemistry C
• Print ISSN: 2050-7526
• Electronic ISSN: 2050-7534
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 3
• Issue: 22
• Pages: 5754-5763
• DOI: https://doi.org/10.1039/c5tc00661a
• Keywords: Materials Chemistry; General Chemistry
• Public URL: https://hull-repository.worktribe.com/output/378623
• Publisher URL: http://pubs.rsc.org/en/Content/ArticleLanding/2015/TC/C5TC00661A#!divAbstract
• Additional Information: This is a pre-copyedited, author-produced PDF of an article accepted for publication in Journal of materials chemistry C following peer review. The version of record, McLaren, S. (2015) Stabilised columnar mesophases formed by 1 : 1 mixtures of hexaalkoxytriphenylenes with a hexaphenyltriphenylene-based polymer. Journal of materials chemistry C, Volume 3, Issue 22, Pages 5754-5763, is available online at: http://dx.doi.org/10.1039/C5TC00661A.
• Contract Date: Nov 23, 2017