An unusual phase sequence of iso liq-blue phase-smectic A observed for novel binaphthyl mesogenic derivatives

Phase transition behaviour of novel Y‐shaped liquid crystal oligomers

“…We have reported novel pre-organized systems, e.g. U-shaped molecules [18], binaphthyl derivatives [19] and l-shaped molecules [20]; the pre-organized compounds were found to induce unusual ordering in the supramolecular liquid crystalline phase. The l-shaped molecule, 4-cyanobiphenyl-49-yl 3,4-bis{6-[4-(5-octylpyrimidin-2-yl)phenyloxy]hexyloxy}benzoate (figure 1, compound 1a), showed a phase sequence of isotropic -nematicsmectic A-incommensurate smectic A [20].…”

Electro‐Optical Switching in a Blue Phase III Exhibited by a Chiral Liquid Crystal Oligomer

“…1 K) between the isotropic liquid and the chiral nematic (N*) phase of sufficiently short pitch, except in a few cases where a SmA to BP transition has been observed. [9][10][11][12][13] Electric field effects in blue phases have been investigated. The applied field can engender three distinct transformations: a local reorientation of the molecules, distortion of the lattice (electrostriction), and phase transition to lower symmetry phases.…”

Synthesis and Liquid Crystalline Properties of 3‐Substituted Pentane‐2,4‐dione, Pyrazole and Isoxazole Derivatives

“…A similar texture has been reported in several literatures. 16,17 In contrast, the isoxazole 3 displayed an enantiotropic nematic mesophase assigned by the typical Schlieren texture. In comparison with the β-diketonate 1, the increased mesogenic character of the pyrazole and isoxazole derivatives is due to their conjugated character and their high dipole moments, both of which favor the formation of mesophase, in particular, the presence of H bonds in the pyrazole 2 increases the molecular interactions and consequently promotes the formation of the smectic A mesophase.…”