Discotic mesomorphism of rufigallol hexa-n-alkoxylates

Aliphatic ethers of rufigallol have been prepared and their discotic mesomorphism studied. All the compounds give enantiotropic, columnar mesophases with a regular stacking of the discs along the columns, as revealed by the X-ray diffraction patterns of the mesophases. Calorimetric data indicate a wide range of stability of the mesophase. Solid polymorphism has been demonstrated that involves both solution crystallized and melt crystallized samples.