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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Construction of a functional layered solid using the tetrakis(imidazolyl)borate coordinating anion
Barton H Hamilton1, Kathryn A Kelly, Todd A Wagler
1Department of Chemistry, Knight Chemical Laboratory, University of Akron, Akron, OH 44325, USA.
Inorganic Chemistry
|October 2, 2002
Summary
This study demonstrates a layered coordination polymer capable of solid-state anion exchange, similar to natural minerals. Researchers confirmed crystallinity retention during nitrate and iodide exchange using advanced NMR and diffraction techniques.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Solid-State Chemistry
Background:
- Layered coordination polymers offer potential for functional applications due to their structural motifs.
- Anion exchange in the solid state is a desirable property for materials synthesis and modification.
- Lead-based coordination polymers are of interest for their diverse structural and electronic properties.
Purpose of the Study:
- To synthesize and characterize a novel layered coordination polymer using tetrakis(imidazolyl)borate and lead(II) nitrate.
- To investigate the solid-state anion exchange capabilities of the synthesized material.
- To confirm the retention of crystallinity during anion exchange processes.
Main Methods:
- Synthesis of the coordination polymer Pb[B(Im)(4)](NO(3)) from lead(II) nitrate and tetrakis(imidazolyl)borate.
- Solid-state anion exchange experiments involving nitrate and iodide ions.
- Characterization using (15)N and (207)Pb Solid-State Nuclear Magnetic Resonance (SSNMR) spectroscopy.
- Confirmation of crystallinity using Infrared (IR) spectroscopy and powder X-ray diffraction (XRD).
Main Results:
- The coordination polymer Pb[B(Im)(4)](NO(3)) was successfully synthesized as a layered material.
- The compound exhibited facile solid-state anion exchange, readily exchanging nitrate anions.
- Stoichiometric exchange of nitrate for (15)N-labeled nitrate and iodide was confirmed.
- Crystallinity was maintained throughout the anion exchange processes, as evidenced by IR and powder XRD data.
Conclusions:
- The layered coordination polymer Pb[B(Im)(4)](NO(3)) possesses significant potential for solid-state anion exchange applications.
- The material's ability to retain crystallinity during exchange makes it a promising candidate for functional materials.
- This work highlights the analogy between synthetic layered coordination polymers and natural layered minerals in terms of ion-exchange behavior.
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