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Updated: Jun 29, 2026
From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Hexagonal crystalline inclusion complexes of 4-iodophenoxy trimesoate
F Christopher Pigge1, Venu R Vangala, Pradeep P Kapadia
1Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, USA. chris-pigge@uiowa.edu
Unique iodo-arene trimers form via bifurcated halogen bonding, creating nanoscale channels within trimesic acid iodophenolate inclusion complexes. This discovery advances supramolecular chemistry and materials science.
Area of Science:
- Supramolecular Chemistry
- Crystal Engineering
- Materials Science
Background:
- Halogen bonding is a crucial non-covalent interaction in molecular recognition and crystal engineering.
- Inclusion complexes offer platforms for creating ordered nanoscale structures.
- Trimesic acid and its derivatives are versatile building blocks in supramolecular chemistry.
Purpose of the Study:
- To investigate the role of bifurcated halogen bonding in the self-assembly of iodo-arene molecules.
- To explore the formation of novel supramolecular architectures and nanoscale channels.
- To characterize the inclusion complexes formed between trimesic acid and iodophenolate.
Main Methods:
- Single-crystal X-ray diffraction analysis to determine molecular structures and packing.
- Spectroscopic techniques to confirm complex formation.
- Computational modeling to understand halogen bonding interactions.
Main Results:
- Bifurcated I···C and I···O halogen bonding interactions were identified as key drivers.
- Unique iodo-arene trimers self-assembled into ordered structures.
- Nanoscale channels were observed within the inclusion complexes of trimesic acid iodophenolate.
Conclusions:
- Bifurcated halogen bonding is a powerful tool for directing the assembly of iodo-arene trimers.
- The formation of nanoscale channels opens possibilities for host-guest chemistry and materials applications.
- This study provides fundamental insights into the design of functional supramolecular materials.
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