Porous ladder polymer networks (ladder PPNs) represent an emerging class of porous organic materials constituted by crosslinked, fully fused ladder-type backbones. Their unique structural characteristic allows for the integration of the properties of porous organic polymers and ladder polymers in a synergistic manner, affording materials featuring high porosity, structural diversity, backbone rigidity, extended π-conjugation, extraordinary stability, etc. These materials with various topologies can be bottom-up synthesized by either direct ring-fusing crosslinking or stepwise crosslinking followed by ladderization. These ladder PPNs exhibit the anticipated ultrahigh stability, electrical conductivity, functional rigid pores, or entropically favorable gas adsorption. The synergistic combination of these functions promises the great potential of ladder PPNs in a wide range of future applications, including energy storage, catalysis, and sensing. To achieve these goals, it is critical to address the fundamental and practical challenges associated with the narrow scope of topologies, structural defects, synthetic scalability, and processability of ladder PPNs.

多孔梯形聚合物网络（梯形PPN）代表了新兴的一类由交联的，完全融合的梯形骨架构成的多孔有机材料。它们独特的结构特征允许以协同方式整合多孔有机聚合物和梯形聚合物的特性，从而提供具有高孔隙率，结构多样性，骨架刚性，扩展的π-共轭，非凡稳定性等特性的材料。这些材料具有多种拓扑结构可以通过直接环熔交联或逐步交联然后阶梯化来自下而上合成。这些梯形PPN表现出预期的超高稳定性，导电性，功能性刚性孔或对熵有利的气体吸附。这些功能的协同组合使梯形PPN在广阔的未来应用中具有巨大潜力，包括能量存储，催化和传感。为了实现这些目标，至关重要的是应对与拓扑的狭窄范围，结构缺陷，综合可伸缩性和梯形PPN的可加工性相关的基本和实际挑战。