An Ultra‐Microporous Metal–Organic Framework with Exceptional Xe Capacity
Abstract
Molecular confinement plays a significant effect on trapped gas and solvent molecules. A fundamental understanding of gas adsorption within the porous confinement provides information necessary to design a material with improved selectivity. In this regard, metal–organic framework (MOF) adsorbents are ideal candidate materials to study confinement effects for weakly interacting gas molecules, such as noble gases. Among the noble gases, xenon (Xe) has practical applications in the medical, automotive and aerospace industries. In this Communication, we report an ultra‐microporous nickel‐isonicotinate MOF with exceptional Xe uptake and selectivity compared to all benchmark MOF and porous organic cage materials. The selectivity arises because of the near perfect fit of the atomic Xe inside the porous confinement. Notably, at low partial pressure, the Ni–MOF interacts very strongly with Xe compared to the closely related Krypton gas (Kr) and more polarizable CO2. Further 129Xe NMR suggests a broad isotropic chemical shift due to the reduced motion as a result of confinement.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 16, 2020
- Source ID
- 10.1002/chem.202002331
Entities
People
- Debanjan Chakraborty
- James C. Hayes
- Kee Sung Han
- Paul Humble
- Praveen K. Thallapally
- Radha Kishan Motkuri
- Rahul Maity
- Ramanathan Vaidhyanathan
- S.M. Collins
- Shyamapada Nandi
- Tom K. Woo
Organizations
- Defense Threat Reduction Agency
- Indian Institutes of Science Education and Research
- Pacific Northwest National Laboratory
- University of Ottawa