Intrinsically chiral ferronematic liquid crystals: An inversion of the helical twist sense at the chiral nematic – Chiral ferronematic phase transition

The effect of a lateral alkyloxy chain on the ferroelectric nematic phase

“…aValues extracted from DSC cooling traces.bMeasured using the polarised light microscope.cTaken from Pociecha et al 29 …”

“…aValues extracted from DSC cooling traces.bExtracted from Mandle et al 5 cTaken from Pociecha et al . 29 …”

“…In particular, a direct N F -I transition has been observed only in a very limited number of molecules. 23,[26][27][28][29] Using RM734 as a structural template, here we report the transitional properties of two series of ferroelectric nematogens containing a lateral alkyloxy chain, the 4-[(4nitrophenoxy)carbonyl]phenyl 2-alkoxy-4-methoxybenzoates (5m) and the 4-[(3-uoro-4-nitrophenoxy)carbonyl]phenyl 2alkoxy-4-methoxybenzoates (6-m) (Fig. 2).…”

A new order of liquids: polar order in nematic liquid crystals

“…Elongation of the lateral methoxy unit reduces T NF-N relative to RM734, however melting points and clearing points are also reduced. 28 Imrie et al also reported a number of RM734 derivatives with alternate lateral groups, including the ( S )-2-methylbutoxy group which leads to the chiral N F phase, 20 with this material also being reported independently by others. 18 Again, the increased steric bulk of these lateral groups depresses T NF-N when compared to the parent material.…”

“…Notably, the polar analogue of the chiral nematic phase has very recently been discovered. 17–21 Lastly, one further example of nematic polymorphism must be considered. In 2011 the twist-bend nematic phase was discovered, having being predicted some ten years earlier by Ivan Dozov, marking the first new nematic phase type discovered in over half a century.…”