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Polymeric Halogen-Bond-Based Donor Systems Showing Self-Healing Behavior in Thin Films
Ronny Tepper1,2, Stefan Bode1,2, Robert Geitner3
1Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, 07743, Jena, Germany.
Angewandte Chemie (International Ed. in English)
|March 8, 2017
Summary
This study introduces novel self-healing polymer networks using halogen bonds for anion recognition. These advanced materials demonstrate tunable anion affinity and excellent self-healing properties, opening new avenues in polymer science.
Area of Science:
- Polymer Chemistry
- Supramolecular Chemistry
- Materials Science
Background:
- Anion receptors are crucial for molecular recognition and sensing.
- Polymeric materials offer unique advantages for receptor design and application.
- Halogen bonding is an underutilized interaction in supramolecular polymer chemistry.
Purpose of the Study:
- To synthesize and characterize cleft-type anion receptors within a polymer architecture.
- To investigate the influence of polymer structure and bonding type on anion binding affinity.
- To develop self-healing polymer networks utilizing halogen-bonding interactions.
Main Methods:
- Isothermal titration calorimetry (ITC) to quantify anion binding.
- Synthesis of polymeric cleft-type anion receptors.
- FT-Raman spectroscopy and nano-indentation for mechanism elucidation.
- Copolymerization with carboxylate groups to form supramolecular networks.
Main Results:
- Systematic series of polymeric anion receptors synthesized and characterized.
- First quantitative study of anion affinity in polymeric halogen-bond donors using ITC.
- Demonstrated tunable anion affinity by varying receptor parameters.
- Developed supramolecular polymer networks with intrinsic self-healing capabilities.
- Elucidated the self-healing mechanism via halogen bond reformation.
Conclusions:
- Polymeric halogen-bond donors effectively bind anions with tunable affinity.
- Supramolecular cross-linking via anion-receptor interactions leads to self-healing polymers.
- Halogen bonds are a promising tool for designing advanced functional polymers.
- These findings open new applications for halogen-bond donors in materials science.
