A Novel Nematic-Like Mesophase Induced in Dimers, Trimers and Tetramers Doped with a Highly Chiral Additive

2018-07-06T16:53:07Z (GMT) by Richard Mandle John W. Goodby
<p>From the observation of a previously undiscovered nematic-like mesophase (N<sub>X</sub>) by Archbold <i>et al</i>, we report on several new binary liquid-crystalline mixtures between the high helical twisting power dopant RM1041 and a selection of dimers with varying average bend angles and conformational landscapes. We also report on mixtures between RM1041 and oligomeric LC materials. We find that dimers and oligomers exhibit not only chiral nematic and twist-bend modulated phases, but also the same N<sub>X</sub> phase reported by Archbold, indicating that this state of matter (the structure of which is yet to be definitively characterised) is exhibited by a wide range of materials. Mixtures of the dimer <i>CB9CB</i> with a selection of different chiral dopants suggest that it is the helical twisting power of the chiral additive that is responsible incidence of the N<sub>X </sub>phase.</p>