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Aromatic Embrace Motifs for Bulk Supramolecular Polymers
Nicholas Lanigan1, Abdeljalil Assoud1, Wei Zhang2
1Department of Chemistry, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|July 27, 2019
Summary
Aromatic embraces (AEs) form robust supramolecular polymer chains. These chains exhibit polymer behavior and remain stable at high temperatures, suppressing crystallization and advancing supramolecular chemistry.
Area of Science:
- Supramolecular Chemistry
- Polymer Science
- Materials Science
Background:
- Aromatic embraces (AEs) are interactions between arylated molecules in crystalline materials.
- AEs serve as robust motifs for constructing amorphous bulk supramolecular polymers (BSPs).
Purpose of the Study:
- To investigate the self-assembly of a polymorphic compound, FpC6, into supramolecular polymer chains via AEs.
- To explore the polymer behavior and thermal stability of the resulting BSP.
Main Methods:
- Crystal engineering was used to study the assembly of FpC6.
- Thermal analysis and characterization of the resulting bulk supramolecular polymer were performed.
Main Results:
- FpC6 consistently formed "ladder" chains through a specific AE motif upon melting.
- The resultant BSP exhibited typical polymer characteristics, including glass transition and viscoelasticity.
- AE-formed ladder chains remained assembled up to 130°C and suppressed crystallization during cooling.
Conclusions:
- AEs provide a viable route to high-temperature stable supramolecular polymers.
- The ability of AEs to form stable chains and inhibit crystallization opens new avenues in BSPs and supramolecular chemistry.
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