The emergence of a polar nematic phase: a chemist's insight into the ferroelectric nematic phase.

Cruickshank, Ewan

Abstract

The discovery of a new polar nematic phase; the ferroelectric nematic, has generated a great deal of excitement in the field of liquid crystals. To date there have been around 150 materials reported exhibiting the ferroelectric nematic phase, in general, following three key archetypal structures with these compounds known as RM734, DIO and UUQU-4N. In this review, the relationship between the molecular structure and the stability of the ferroelectric nematic, NF, phase will be described from a chemist's perspective. This will look to highlight the wide variety of functionalities which have been incorporated into these archetypal structures and how these changes influence the transition temperatures of the mesophases present. The NF phase appears to be stabilised particularly by reducing the length of terminal alkyl chains present and adding fluorines laterally along the length of the molecular backbone. This review will look to introduce the background of the ferroelectric nematic phase before then showing the molecular structures of a range of materials which exhibit the phase, describing their structure–property relationships and therefore giving an up–to–date account of the literature for this fascinating new mesophase.

Citation

CRUICKSHANK, E. 2024. The emergence of a polar nematic phase; a chemist's insight into the ferroelectric nematic phase. ChemPlusChem [online], Early View. Available from: https://doi.org/10.1002/cplu.202300726

• Journal Article Type: Review
• Acceptance Date: Mar 7, 2024
• Online Publication Date: Mar 26, 2024
• Deposit Date: Apr 5, 2024
• Publicly Available Date: Apr 5, 2024
• Journal: ChemPlusChem
• Electronic ISSN: 2192-6506
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Article Number: e202300726
• DOI: https://doi.org/10.1002/cplu.202300726
• Keywords: DIO; Ferroelectric nematic phase; Fluorine; Liquid crystal; Nematic phase; RM734; UUQU0-4N
• Public URL: https://rgu-repository.worktribe.com/output/2278386