• Studies on mixed mesomorphism: Determination of latent transition temperature (LTT) by extrapolation

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    • Keywords


      Liquid crystal; mesogen; mixed mesomorphism; monotropy; anisotropy

    • Abstract


      A nonmesogenic component of a binary system mixed with a liquid-crystal component must have the latent ability to exhibit mesomorphism. But this cannot normally be observed because the transition temperature from the amorphous liquid to the mesophase lies below the normal melting point. This latent transition temperature of nonliquid crystal substances are determined by the extrapolation method. Binary systems consisting of structurally similar components, viz.p-methoxyphenyl-′p-methoxycinnamate (A) (117·0–141·5°C) as liquid crystal component and other a nonliquid-crystal component (B) (Schiff’s base), are studied. Extrapolation of the transition curves yield the latent transition temperature of the nonliquid-crystal component. The values of LTT for different Schiff’s bases are in fair agreement with literature values. The transition temperatures of the binary systems as well as the constituent components were observed.

    • Author Affiliations


      J M Lohar1 A V Doshi1

      1. Chemistry Department, Matushri Virbaima Mahila College, Kalawad Road, Rajkot - 360 001, India
    • Dates

  • Journal of Chemical Sciences | News

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