DIRECTIONAL ENERGY-TRANSFER IN COLUMNAR LIQUID-CRYSTALS - A COMPUTER-SIMULATION STUDY

We have investigated energy transfer between solute molecules in syste ms of discotic Gay-Berne molecules forming columnar as well as isotrop ic and nematic mesophases, employing computer experiments that combine Monte Carlo simulations of the phase structure and a stochastic appro ach to the transfer. The time-dependent excitation probability and the mean square displacement of the initial excitation show an enhanced e nergy transfer in the columnar phase, with a faster energy transfer al ong the column axis.