Moecular Dynamics in Columnar Phases Exhibited by Compounds of Discotic and Biforked Molecules. A Comparative Study from NMR Results

摘要

In this work we compare the outstanding featuresof the molecular dynamics behaviour as observed by NMR indifferent columnar mesophases. Columnar mesophases ofmonomolecular transverse section (e.g. the D_(ho) phase ofdiscotic molecules) and of polymolecular transverse section (e.g.the #psi#_h phase exhibited by polycatenar mesogens) arecompared. In addition, recent studies on mesophases formed bybiforked molecules allow us for the comparison of the molecularmovements in lamellar and columnar mesophases formed by the same molecules.