Hydrogen-Bonded Organic Framework Membranes: Emerging Nanofluidic Platforms for Gas Separation.

The development of efficient and sustainable gas separation technologies is crucial for addressing global challenges in energy and the environment. Membrane separation technology, as an innovative, energy-saving, and highly efficient approach, offers an effective solution to these challenges. High-performance membranes materials serve as the core component enabling advanced and efficient membrane separation. Notably, hydrogen-bonded organic frameworks (HOFs) represent an emerging class of crystalline porous membrane materials formed through intermolecular hydrogen bonds between organic or metal-organic building units. The unique advantages of these materials, including moderate synthesis conditions, high crystallinity, and easy repairability and renewability, make them ideal porous membrane materials. This review comprehensively examines recent advances in HOF gas separation membranes. We objectively outline fabrication approaches and material design principle, including development prospects and preparation techniques for HOF separation membranes. We then systematically evaluate the current application status of HOF membranes in gas separation. Finally, future application potentials are projected, and challenges to be addressed in HOF gas separation are discussed.