Construction of microporous covalent organic frameworks for high gas uptake capacities

Covalent organic frameworks (COFs) show excellent stability, high porosity, and a designable skeleton, making them an ideal platform for gas capture. Here, two microporous COFs (M-COFs) were synthesized using short building blocks, which were advantageous for gas uptake through the pores. Additionally, the presence of abundant oxygen and nitrogen atoms on the walls of M-COFs further improved the gas uptake ability through weak interactions. Notably, the M-COFs exhibited high gas capture values (carbon dioxide: 72.5 cm3 g-1; methane: 35.2 cm3 g-1; iodine: 4.74 g g-1). This design has opened a new pathway for enhancing gas capture, hence addressing urgent environmental issues. Covalent organic frameworks (COFs) show excellent stability, high porosity, and a designable skeleton, making them an ideal platform for gas capture.

Automated summary

Covalent organic frameworks (COFs) with excellent stability and high porosity have shown potential for gas capture. In this study, two microporous COFs were synthesized, and the introduction of oxygen and nitrogen atoms on the walls further enhanced the gas uptake capacity. The results demonstrate the effectiveness of this design in improving gas capture and addressing environmental issues.