Tailoring Discotic Mesophases: Columnar Order Enforced with Hydrogen Bonds (pages 1614–1618)
R.I. Gearba, M. Lehmann, J. Levin, D.A. Ivanov, M.H.J. Koch, J. Barberá, M.G. Debije, J. Piris and Y.H. Geerts
Version of Record online: 7 OCT 2003 | DOI: 10.1002/adma.200305137
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).