alexa Synthesis, Characterization and Mesomorphic Properties of Aromatic Acid Dimers
Chemical Engineering

Chemical Engineering

Journal of Chromatography & Separation Techniques

Author(s): Ashwini Pandey, Bachcha singh

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In this study, a new series of acid dimers, N-(4′-carboxybenzylidene)-4-alkoxybenzoyloxyaniline [(4′-HOOCC6H4CH˭N)-4-C6H4OCOC6H4OR, where R = CmH2m + 1 and m = 6, 8, 10, 12, 14, and 16], have been synthesized. The compounds have been characterized by elemental analyses and FTIR, UV-visible, 1H, and 13C NMR spectra. The mesomorphic properties of these acid dimers were studied by differential scanning calorimetry and polarizing optical microscopy. The mesomorphic nature of these compounds depends on hydrogen bonding and on the alkoxy chain length. The compounds with m = 6 and 8 show a characteristic enantiotropic nematic mesophase, whereas those with m = 12 and 14 exhibit monotropic behavior. The compounds with m =10 and 16 exhibit non-mesomorphic behavior.

This article was published in Molecular Crystals and Liquid Crystals and referenced in Journal of Chromatography & Separation Techniques

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