Constructing a porous aromatic skeleton with specially designed patterns for charge storage and transfer

Porous skeleton has high porosity and adjustable function. These two characteristics together create sufficient interfaces for material exchange and energy transfer within the skeleton. For crystalline porous frameworks, including metal organic frameworks (MOFs) and covalent organic frameworks (COFs), their long-range ordered structures do play an important role in managing various physical and chemical behaviors, such as electron transfer or bandgap engineering. Now their functions can be predicted based on the revealed structure and structure performance relationship. In contrast, porous organic frameworks (POFs) represent members of the porous solid family without long-range regularity. For POF, the randomly stacked building units and their disordered connections hinder the electronic structural consistency of the entire network. However, many studies have shown that the function of POF can also be designed and originated from its local motifs.