Fused aromatic networks (FANs) are a new generation of porous organic networks (PONs), which are thermodynamic products. FANs are also kinetic products with low crystallinity. Nevertheless, their high physicochemical stability suggests many potential applications. This work reports three structures with their fully fused aromatic units vertically (V), horizontally (H), and three-dimensionally (3D) linked to the growth direction, forming “standing” FAN (VS-FAN), “planar” FAN (HP-FAN), and 3D-FAN, respectively. Their performance as sorbent materials was evaluated. While the VS-FAN has the fastest kinetics for CH₄ and I₂ adsorption due to the highest segmental freedom, the HP-FAN exhibits the best separation selectivity of the CH₄/N₂ mixture due to the strongest segmental confinement. The 3D-FAN displays the highest adsorption capacity of CH₄ because of the highest specific surface area. The results suggest that the different segmental arrangements may critically affect the sorbent performance of FANs.

稠合芳香网络 (FAN) 是新一代多孔有机网络 (PON)，是热力学产品。FAN 也是低结晶度的动力学产品。然而，它们的高物理化学稳定性表明了许多潜在的应用。这项工作报告了三种结构，其完全稠合的芳族单元垂直（V）、水平（H）和三维（3D）与生长方向相连，形成“站立”FAN（VS-FAN）、“平面”FAN（ HP-FAN) 和 3D-FAN。评价了它们作为吸附材料的性能。由于最高的分段自由度，VS-FAN 具有最快的 CH ₄和 I ₂吸附动力学，而 HP-FAN 表现出 CH ₄ /N ₂的最佳分离选择性由于最强的节段限制而混合。由于最高的比表面积，3D-FAN 显示出最高的 CH ₄吸附容量。结果表明，不同的分段排列可能会严重影响 FAN 的吸附剂性能。