Liquid Crystalline Macrocycles and Polyacrylates Containing 4- Alkoxybenzoic Acid and 4-Alkoxybenzamide Structural Units
OKLAHOMA STATE UNIV STILLWATER DEPT OF CHEMISTRY
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The hexa-4-dodecyloxy benzamide and hexa-4-hexyloxy benzamide derivatives of 18-n62 and 3, the tetra-4-dodecyloxy benzamide derivative of 14-N4 7, and a mono-12- hydroxydodecyl-penta-4-dodecyloxybenzoyl derivative of 18-N65 have been prepared, and their phase transitions have been determined by DSC and polarizing microscopy. Compounds 2 and 5 have a discotic mesophase. No mesophase was detected for compounds 3 and 7. The transition temperatures of compound 2 differ substantially from those reported earlier by Lehn, et al., and by DSC 2 exhibits polymer like thermal history. The 12-hydroxy and 12-acryloxy derivatives of 4-dodecyloxy benzoic acid and ethyl 4- dodecyloxy benzoate were prepared. Only the carboxylic acids had thermotropic mesophases. Free radical polymerizations of the acrylate monomers gave mesogenic polyacrylates with pendant 4-12-oxydodecyloxy benzoic acid and ethyl 4-12- oxydodecyloxybenzoate side chains. Benzoic acids, Acrylates, Polymers, Liquid crystals, Amides.
- Organic Chemistry
- Polymer Chemistry