Hydrogen bonding can be used to significantly enforce the intra-columnar stacking order in discotic mesogens. The ordered hexagonal columnar mesophase of a HAT-CONHR derivative is characterized by the smallest inter-disk distance ever found in columnar liquid crystals (3.18–3.20 Å). This additional attractive interaction between the disks in the column results in a regular disc stacking and thus in a high charge-carrier mobility over the whole investigated temperature range (from room temperature up to 200¿°C).
Gearba, R., Lehmann, M., Levin, J., Ivanov, D. A., Barbera, J., Debije, M. G., ... Geerts, Y. H. (2003). Tailoring discotic mesophases: columnar order enforced with hydrogen bonds. Advanced Materials, 15(19), 1614-1618. https://doi.org/10.1002/adma.200305137