The synthesis of a polymer that combines the processability of plastics with the extreme rigidity of cross-linked organic networks is highly attractive for molecular sieving applications. However, cross-linked networks are typically insoluble or infusible, preventing them from being processed as plastics. Here, we report a solution-processable conjugated microporous thermoset with permanent pores of ~0.4 nm, prepared by a simple heating process. When employed as a two-dimensional molecular sieving membrane for hydrogen separation, the membrane exhibits ultrahigh permeability with good selectivity for H₂ over CO₂, O₂, N₂, CH₄, C₃H₆ and C₃H₈. The combined processability, structural rigidity and easy feasibility make this polymeric membrane promising for large-scale hydrogen separations of commercial and environmental relevance.

结合了塑料的可加工性和交联有机网络的极高刚性的聚合物合成技术对于分子筛应用具有极大的吸引力。但是，交联网络通常是不溶的或不溶的，从而阻止了将其加工为塑料。在这里，我们报告了一种溶液加工的共轭微孔热固性材料，其永久孔隙为〜0.4 nm，是通过简单的加热工艺制备的。当用作二维分子筛膜进行氢分离时，该膜具有超高的渗透性，对H _2的选择性优于CO ₂，O ₂，N ₂，CH ₄，C ₃ H ₆和C ₃高₈。加工性能，结构刚度和容易的可行性相结合，使得这种聚合物膜有望用于商业和环境相关的大规模氢分离。