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Updated: May 8, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Extended-Core Discotic Liquid Crystals Based on the Intramolecular H-Bonding in N-Acylated
A R Palmans1, J A Vekemans, H Fischer
1Laboratory of Organic Chemistry, Eindhoven University of Technology POBox 513, 5600 MB Eindhoven (The Netherlands), Fax: Int. code +(40)245-1036,
Abstract:
A new type of disc-shaped molecule (1 a-c) has been synthesised and characterised. The molecules were built up by linking three lipophilic, N-monoacylated 2,2'-bipyridine-3,3'-diamine wedges to a central 1,3,5-benzenetricarbonyl unit. They show liquid crystalline behaviour, as shown by DSC, polarisation microscopy and X-ray diffraction. In all cases the mesophase was characterised as a Dho phase. From (1) H NMR results it was shown that the interior of compounds 1 a-c preferentially adopts a C3 symmetrical conformation owing to strong intramolecular H-bonding, which gives rise to an extended core. This large core induces strong interactions between molecules, leading to mesophases of enhanced thermal stability.
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