Effect of Lateral Substitution of Different Polarity on the Mesophase Behaviour in Pure and Mixed States of 4-(4'-substituted phenylazo)-2-substituted phenyl-4''-alkoxy benzoates
- Citation:
- Naoum, M. M., A. A. Fahmi, M. A. Alaasar, and A. M. E. Aziz, "Effect of Lateral Substitution of Different Polarity on the Mesophase Behaviour in Pure and Mixed States of 4-(4'-substituted phenylazo)-2-substituted phenyl-4''-alkoxy benzoates", Liquid Crystals, 2011.
Abstract:
Two groups of 4-(4'-substituted phenylazo)-2-phenyl-4''-alkoxy benzoates were prepared and their mesophase formation and stability investigated. Each group (Ina-e and IIna-e) constituted five homologous series differing in their terminal substituent, CH3O, CH3, H, Cl or NO2. Within each series the number of carbons in the terminal alkoxy chain was 8, 10, 12, 14 or 16. The two main groups of compounds (I and II) differed in the polarity of the lateral substitutent attached to the central benzene ring. Group I had a chlorine atom adjacent to the ester group, replaced in Group II by the weakly electron-donating methyl group.
Notes:
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