Shape- persistent macrocycle with intraannular alkyl groups: some structural limits of discotic liquid crystals with an inverted structure

• Sigurd Höger,
• Jill Weber,
• Andreas Leppert and
• Volker Enkelmann

Beilstein J. Org. Chem. 2008, 4, No. 1, doi:10.1186/1860-5397-4-1

• peripheral flexible side groups that point outward [13][14][15][16]. They can be used for a variety of different optic and electronic applications, for example as materials for photovoltaics (in the columnar phase) [17][18][19] or as compensation layers in display technology (in the nematic phase) [20][21

• 1 with longer adaptable side groups are yet not investigated. Two compounds of that structure are described in this work. Macrocycle 26a melts isotropically at 98 °C (first heating, ΔH = 85.2 kJ/mol). However, cooling of the isotropic melt leads to the formation of a (monotropic) nematic phase at 90