Cyanoalkyl difluoro-terphenyl-carboxylate chiral dopants

Kayani, Zohra N.; Lewis, Robert A.; Naseem, Shahzad

Abstract

A liquid crystal like difluoroterphenyl chiral dopant was synthesized to match the dimensions of a host chiral dopant mixture. The melting point of the chiral dopants was decreased by increasing the length of the alkyl chain. The melting point of the chiral dopants also decreased when fluorine was on the same ring as the ester i.e. at 2″, 3″ position. These dopants were formulated with terphenyl host mixture and liquid crystal properties were assessed. New dopants, when added to the host mixture, maintain SmA 1 but the SmC 2 phase was reduced markedly. There was a decrease in spontaneous polarisation when fluorine was on the same ring as the ester i.e. at 2″, 3″ position. As the molecular weight of the chiral dopant increased (pentyl ↑ heptyl ↑ nonyl), spontaneous polarisation decreased.

Citation

Kayani, Z. N., Lewis, R. A., & Naseem, S. (2012). Cyanoalkyl difluoro-terphenyl-carboxylate chiral dopants. Journal of Molecular Liquids, 170, 11-19. https://doi.org/10.1016/j.molliq.2012.03.018

• Journal Article Type: Article
• Acceptance Date: Jun 30, 2012
• Publication Date: 2012-06
• Journal: JOURNAL OF MOLECULAR LIQUIDS
• Print ISSN: 0167-7322
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 170
• Pages: 11-19
• DOI: https://doi.org/10.1016/j.molliq.2012.03.018
• Keywords: Chiral dopant; Host mixture; Spontaneous polarisation; Ferroelectric liquid crystal
• Public URL: https://hull-repository.worktribe.com/output/417787