Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume -, Issue -, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202313951
Keywords
Anion Coordination Chemistry; Halide Anions; Hydrogen-Bonded Organic Frameworks; Polarization; Xenon/Krypton Separation
Categories
Ask authors/readers for more resources
Hydrogen-bonded frameworks built from charged components or metallotectons offer diverse guest-framework interactions for target-specific separations. In this study, the coordination chemistry of monovalent halide anions was systematically explored to develop hybrid H-bond synthons for the construction of microporous H-bonded frameworks with tunable surface polarity for efficient Xe/Kr separation. The spherical halide anions readily participate in charge-assisted H-bonding assembly, resulting in robust frameworks with open pore channels. The activated frameworks exhibit preferential binding towards Xe due to enhanced polarizability and pore confinement effect.
Hybrid hydrogen-bonded (H-bonded) frameworks built from charged components or metallotectons offer diverse guest-framework interactions for target-specific separations. We present here a study to systematically explore the coordination chemistry of monovalent halide anions, i.e., F-, Cl-, Br-, and I-, with the aim to develop hybrid H-bond synthons that enable the controllable construction of microporous H-bonded frameworks exhibiting fine-tunable surface polarity within the adaptive cavities for realistic xenon/krypton (Xe/Kr) separation. The spherical halide anions, especially Cl-, Br-, and I-, are found to readily participate in the charge-assisted H-bonding assembly with well-defined coordination behaviors, resulting in robust frameworks bearing open halide anions within the distinctive 1D pore channels. The activated frameworks show preferential binding towards Xe (IAST Xe/Kr selectivity ca. 10.5) because of the enhanced polarizability and the pore confinement effect. Specifically, dynamic column Xe/Kr separation with a record-high separation factor (SF=7.0) among H-bonded frameworks was achieved, facilitating an efficient Xe/Kr separation in dilute, CO2-containing gas streams exactly mimicking the off-gas of spent nuclear fuel (SNF) reprocessing. The marriage between hydrogen bonding and the coordination chemistry of halide anions offers a promising strategy to construct crystalline microporous frameworks with adaptive cavities and fine-tunable surface polarity for efficient Xe/Kr separation. The activated frameworks show preferential binding towards Xe because of the enhanced polarizability and the pore confinement effect.image
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available