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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
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Halogen bonding assisted selective removal of bromide
Sourav Chakraborty1, Ranjan Dutta, Pradyut Ghosh
1Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, India. icpg@iacs.res.in.
Chemical Communications (Cambridge, England)
|August 25, 2015
Summary
A novel tripodal halogen bond donor receptor selectively binds bromide over chloride and other anions. This selectivity enables the efficient removal of bromide from mixed anion solutions using competitive crystallization.
Area of Science:
- Supramolecular Chemistry
- Anion Recognition
- Halogen Bonding
Background:
- Anion recognition and separation are critical in various chemical and environmental applications.
- Halogen bonding (XB) offers a promising non-covalent interaction for selective molecular recognition.
- Developing selective receptors for specific anions like bromide remains a significant challenge.
Purpose of the Study:
- To design and synthesize a novel tripodal halogen bond (XB) donor receptor based on a benzene platform.
- To investigate the anion binding selectivity of the designed receptor, particularly towards bromide.
- To demonstrate the practical application of the receptor in selective bromide removal from complex mixtures.
Main Methods:
- Synthesis of a new benzene-based tripodal halogen bond donor receptor (1a).
- Spectroscopic and crystallographic studies to characterize the receptor and its complexes.
- Competitive crystallization experiments to assess selective bromide removal.
Main Results:
- The synthesized receptor (1a) exhibited high selectivity for bromide over chloride and other common anions.
- The bromide selectivity was successfully applied in a competitive crystallization process.
- Selective removal of bromide (forming complex 1) from a mixture containing interfering anions was achieved.
Conclusions:
- The benzene platform-based tripodal halogen bond donor receptor demonstrates excellent bromide selectivity.
- Competitive crystallization is an effective strategy for selective bromide removal using this receptor.
- This work provides a new tool for targeted anion separation and recognition.
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