A microporous hydrogen-bonded organic framework for sustainable adsorption and separation of CO₂

Hydrogen-bonded organic frameworks (HOFs) have emerged as promising candidates for CO₂ adsorption and separation due to their highly tunable and controllable nature. In this context, we prepared a diaminotriazine-based HOF material with high stability, desired microporous structure, and easy regenerability, which thus exhibited good CO₂ adsorption performance and selectivity under ambient conditions. The synergistic effect between the pore size and the electrostatic potential of the HOF creates an optimal environment for CO₂ capture, and multiple hydrogen bonding interactions between CO₂ molecules and the HOF enable efficient and specific separation of CO₂/N₂ mixtures. Meanwhile, the exceptional reusability of the HOF for CO₂ capture is underpinned by its outstanding structural stability and efficient regenerability, these properties allowing it to maintain high adsorption capacity and performance across repeated cycles, making it a promising candidate for practical applications.