The separation of light hydrocarbons, including C₂H₆ and C₃H₈, is essential to natural gas upgrading. Meanwhile, N₂ removal from CH₄ is also crucial to concentrating low-quality coalbed methane, but the adsorption process is challenging because of the close kinetic diameter. This work reports two hydrogen-bonded metal-nucleobase frameworks (HOF-ZJU-201 and HOF-ZJU-202) capable of efficiently separating C₃H₈/CH₄, C₂H₆/CH₄, and CH₄/N₂. Due to strong affinity for C₃H₈ and C₂H₆, the low-pressure capacity for C₃H₈ (5 kPa) and C₂H₆ (10 kPa) of HOF-ZJU-201a exceeds most adsorbents. The ideal adsorbed solution theory (IAST) selectivity of C₃H₈/CH₄ and C₂H₆/CH₄ is 119 and 45 at ambient conditions. According to density functional theory calculations, surface polarization environments formed by electron-rich anions and electron-deficient purine heterocyclic rings contribute to the selective capture of C₃H₈ and C₂H₆ with greater polarizability. Furthermore, the high CH₄ adsorption capacity (1.73 mmol/g for HOF-ZJU-201a and 1.50 mmol/g for HOF-ZJU-202a at 298 K and 1.0 bar) and excellent CH₄/N₂ selectivity (6.0 for HOF-ZJU-201 at 298 K), as well as dynamic breakthrough experiments of binary CH₄/N₂ gas mixture implied their efficacy in the concentration of low-quality coalbed methane.

轻烃（包括 C ₂ H ₆和 C ₃ H ₈）的分离对于天然气提质至关重要。_{同时，从 CH 4}中脱除N ₂对浓缩劣质煤层气也至关重要，但由于动力学直径接近，吸附过程具有挑战性。_{这项工作报告了两种能够有效分离 C 3} H ₈ /CH ₄、C ₂ H ₆ /CH ₄和 CH ₄ /N ₂的氢键金属核碱基骨架（HOF-ZJU-201 和 HOF-ZJU-202）. 由于对 C _{3的强亲和力}H ₈和C ₂ H ₆ ， HOF-ZJU-201a对C ₃ H ₈ (5 kPa)和C ₂ H ₆ (10 kPa)的低压容量超过了大多数吸附剂。_{在环境条件下，C 3} H ₈ /CH ₄和 C ₂ H ₆ /CH ₄的理想吸附溶液理论 (IAST) 选择性分别为 119 和 45。根据密度泛函理论计算，富电子阴离子和缺电子嘌呤杂环形成的表面极化环境有助于选择性捕获C ₃ H ₈和C₂ H ₆具有更大的极化率。此外，高 CH ₄吸附容量（HOF-ZJU-201a 为 1.73 mmol/g，HOF-ZJU-202a 在 298 K 和 1.0 bar 下为 1.50 mmol/g）和优异的 CH ₄ /N ₂选择性（HOF-为 6.0 ZJU-201 在 298 K)，以及二元 CH ₄ /N ₂气体混合物的动态突破实验表明它们在浓缩低质量煤层气中的功效。