A New Family of Liquid Crystals: N-Substituted Aldonamides II: Relationship Between Chemical Structure and the Formation of Mesophases

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Abstract
A series of N-substituted aldonamides has been synthesized. Some of these compounds form a thermotropic lamellar mesophase in which molecules in the trans-configuration are arranged in monolayers stabilized by hydrogen bonding and hydrophobic interactions. X-ray diffraction studies have shown that a molecular arrangement of this type exists in the crystalline solid of N-decylribonamide. The relationship between the mesogenic properties and the molecular structures of these compounds is discussed (with reference to the length, branching and cyclisation of the aldonic residue and of the hydrocarbon chain).