Ultramicroporous <b>ZJNU-119</b> for High-Capacity Hydrogen Isotope Adsorption and Separation

The separation of hydrogen isotopes using physisorption-based porous materials has emerged as a promising strategy. Here, we demonstrate that the ultramicroporous framework <b>ZJNU-119</b> exhibits exceptional hydrogen isotope adsorption at 77 K and 1 bar. Dynamic breakthrough experiments indicate a D₂/H₂ separation factor of 1.37, while density functional theory (DFT) calculations reveal that dense one-dimensional ultramicroporous channels and heteroatom-rich pore surfaces govern the host-guest interactions. These findings highlight <b>ZJNU-119</b> as a robust ultramicroporous material with significant potential for energy-efficient hydrogen isotope separation.