Abstract
AbstractWe studied the alignment of discotic molecules induced by several types of alignment layers and found the conditions for the formation of negative uniaxial films and layers with twisted optic axis. The most commonly used alignment layers such as conventional rubbed polyimides and polyvinylalcohol films yield splayed optic axis in discotic films. Fluorinated polyimides induce planar alignment of the optic axis (negative A‐plate). High concentrations of photo‐initiator induce molecular reorientation and produce an effective homeotropic alignment (negative C‐plate). Using a discotic compound with chiral centers in fabrication of planar structures, we obtained films with twisted optic axis.
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