Xenon/Krypton Separation on a Bromine Functionalized Benzimidazole-Linked Porous Covalent Organic Polymer
Xe nuclear magnetic resonance (NMR) spectroscopy provides direct insight into the adsorption behavior, revealing a bimodal pore environment in the brominated polymer during Xe adsorption, indicative of heterogeneous binding sites. Complementary computational modeling elucidates the synergistic interplay between stronger confinement effects in the smaller pores of the brominated framework and energetically favorable adsorption sites in close proximity to the bromine functionalities. This study introduces a distinct separation mechanism for Xe/Kr based on polarity-induced specific interactions rather than conventional size-shape exclusion, offering a rare and effective example of organic porous materials for noble gas separation. The findings highlight halogen functionalization as a powerful strategy for tuning noble gas adsorption energetics and selectivity in covalent organic polymers.
Authors
- Ankita De (ORCID: https://orcid.org/0000-0003-4962-0510)
- Faqing Yang (ORCID: https://orcid.org/0009-0003-1074-9517)
- Yuh Hijikata (ORCID: https://orcid.org/0000-0003-4883-5085)
- Arafat Hossain Khan (ORCID: https://orcid.org/0000-0002-2462-9423)
- Jack D. Evans (ORCID: https://orcid.org/0000-0001-9521-2601)
- Stefan Kaskel (ORCID: https://orcid.org/0000-0003-4572-0303)
- Friedrich Schwotzer (ORCID: https://orcid.org/0000-0002-9244-9440)
- Andreas Schneemann (ORCID: https://orcid.org/0000-0001-6801-2735)
- Eike Brunner (ORCID: https://orcid.org/0000-0003-3511-9899)
- Irena Senkovska (ORCID: https://orcid.org/0000-0001-7052-1029)
- Sattwick Haldar (ORCID: https://orcid.org/0000-0001-9337-4287)
- Christopher Bachetzky (ORCID: https://orcid.org/0000-0002-3900-4442)
- Fanny Reichmayr
- Yutong Wang (ORCID: https://orcid.org/0000-0001-8943-1832)
- Karen M. Garcia Alvarez (ORCID: https://orcid.org/0009-0003-5338-6680)
Institutions
- Institute for the Future (US)
- The University of Adelaide (AU)
- Nagoya University (JP)
- Technische Universität Dresden (DE)
Publication Details
- Journal
- ACS Applied Materials & Interfaces
- Published
- 2026-04-27
- DOI
- https://doi.org/10.1021/acsami.6c03481
- Primary Topic
- Covalent Organic Framework Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Australian Government
- Fonds der Chemischen Industrie
- Indian Institute of Technology Tirupati
- Deutsche Forschungsgemeinschaft
- Australian Research Council