Two‐ and Three‐Dimensional Liquid‐Crystal Phases from Axial Bundles of Rodlike Polyphiles: Segmented Cylinders, Crossed Columns, and Ribbons between Sheets

Pleated ribbons and bow ties : Rodlike mesogens (see scheme) with swallow‐tail side chains arrange axially in ribbonlike bundles. At high temperatures the ribbons rotate, resulting in a novel 3D hexagonal liquid‐crystal phase (see picture, left). At lower temperature, rotation locks in giving a structure of crossed aromatic and fluorinated columns (right). On further cooling the ribbons fuse into aromatic sheets with fluorinated columns intercalated.