Liquid Crystalline Behavior of Two-component Molecular Adducts from Bifunctional Molecules

Abstract

The phase behavior of some binary systems formed by the nicotinic acid diester of methylhydroquinone and some dicarboxylic acids based on terephthalic acid has been examined. A strong interaction takes place between the two components leading, for some of them, to the formation of a liquid crystalline phase at temperatures lower than the melting temperature of both components in the pure state. Liquid crystal glasses may be formed on cooling at room temperature. With terephthalic acid, interaction takes place above the melting temperature of the nicotinic acid diester producing a new solid phase, which melts to give an isotropic liquid. No monotropic mesomorphism is detectable for this system.

Key Words:

• Mesogenic complexes
• hydrogen bonded mesogens