Hypercrosslinked Aromatic Heterocyclic Microporous Polymers: A New Class of Highly Selective CO₂ Capturing Materials

Abstract

Aromatic heterocyclic microporous polymers with high surface areas are obtained by directly crosslinking of the heterocyclic monomers under mild conditions. Owing to the narrow pore system and the heteroatom-rich pore surface, these networks exhibit high CO(2) adsorption capacity and selectivity. At 273 K, the CO(2)/N(2) selectivity of Py-1 is about 117, which is among the highest the reported microporous materials.

Covalent Triazine Frameworks via a Low‐Temperature Polycondensation Approach

“…At the onset of adsorption, the heat of adsorption of CO 2 was 30, 29, 33 and 32 kJ mol −1 for CTF‐HUST‐1, CTF‐HUST‐2, CTF‐HUST‐3, and CTF‐HUST‐4, respectively (Figure S11b), which is in a good range for CO 2 capture applications and higher than reported for CTF‐1 (27.5 kJ mol −1 ) 11. Indeed, the CO 2 adsorption heat for these CTF‐HUSTs is higher than for most other nitrogen‐rich porous organic frameworks, including porous benzimidazole polymers,12 electron‐rich organonitridic frameworks,13 conjugated microporous polymers,14 and hypercross‐linked polymers 15…”

Polymeric molecular sieve membranes via in situ cross-linking of non-porous polymer membrane templates

“…Hypercross-linked polymers represent a new class of porous materials that are prepared mainly by a Friedel-Crafts alkylation reaction [28][29][30] . The permanent porosity in hypercross-linked polymers is a result of extensive cross-linking reactions, which prevent the polymer chains from collapsing into a dense, non-porous state [31][32][33] .…”

A superhydrophobic hyper-cross-linked polymer synthesized at room temperature used as an efficient adsorbent for volatile organic compounds

“…The images indicate the formation of amorphous particles with a size of approximately 50-100 nm in diameter, which is similar to other types of hyper-crosslinked polymers. 17,24 Further analysis of the polymers by thermogravimetric analysis (TGA) showed that the sample has great thermal stability with a thermal decomposition temperature over 550 C ( Fig. S3 †) due to the strong covalent bonding in the network.…”