Skip to main content

Cyanoalkyl difluoro-terphenyl-carboxylate chiral dopants

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

Authors

Zohra N. Kayani

Robert A. Lewis R.A.Lewis@hull.ac.uk

Shahzad Naseem



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.

Journal Article Type Article
Publication Date 2012-06
Journal JOURNAL OF MOLECULAR LIQUIDS
Print ISSN 0167-7322
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 170
Pages 11-19
APA6 Citation Kayani, Z. N., Lewis, R. A., & Naseem, S. (2012). Cyanoalkyl difluoro-terphenyl-carboxylate chiral dopants. Journal of Molecular Liquids, 170, (11-19). doi:10.1016/j.molliq.2012.03.018. ISSN 0167-7322
DOI https://doi.org/10.1016/j.molliq.2012.03.018
Keywords Chiral dopant; Host mixture; Spontaneous polarisation; Ferroelectric liquid crystal
;