Cover Picture: Hydrogen‐Bonded Metal–Nucleobase Frameworks for Efficient Separation of Xenon and Krypton (Angew. Chem. Int. Ed. 11/2022)

Hydrogen-bonded frameworks self-assembled from metal–nucleobase complexes and hexafluoro anions are reported by Wei Zhou, Zongbi Bao et al. in their Research Article (e202117609). Amino-rich ligands provide multiple H-bonding sites to stabilize the frameworks. In confined channels, electron-rich combined with electron-deficient purine rings generate a micro-electric field polarize lock Xe atoms, thus achieving highly efficient Xe/Kr separation under ambient conditions.