The structural characteristics of hyper-cross-linked polymers (HCPs) make them interesting for a wide variety of applications.

Exploring the effect of functional group substitution on the porous structure and gas adsorption performance of polymer materials is becoming much fascinating. Here, three novel polymers, based on various amine building blocks, were efficiently prepared by the solvent knitting method. It is intriguingly found that with the gradual functional group substitution of phenyl by naphthyl in building blocks both porosity and gas uptake capacity of these hyper-cross-linked polymers can be finely tuned, with S BET increased from 874 to 1717 m 2 g −1 , and CO 2 adsorption capacity tuned from 12.76 to 18.85 wt % (273.15 K/1.00 bar). Besides, these polymers could reveal CO 2 /N 2 selectivity up to 24.9 and CO 2 /CH 4 selectivity of 6.3 at 298.15 K. This work has proved that increasing the number of naphthyl in precursors will be in favor of knitting microporous with improved porosity and enhanced gas uptake ability, and naphthyl outweighs phenyl in their contributions to bettering the porosity parameters and gas uptake capacity of synthesized polymers, which is crucially important for the further research.

In order to achieve efficient CO2 capture, four novel microporous organic polymers, based on distinct polycyclic aromatic hydrocarbons, were successfully prepared by the solvent knitting method.

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Simple and highly efficient preparation of porous hyper-cross-linked polymers (HCPs) with high surface area and manifold functionalities for high-performance CO2 uptake and selective separation has drawn multitudinous attention over the...