Pyrene‐based hypercrosslinked microporous resins for effective CO2 capture

ABSTRACT Two hydrophobic pyrene‐based hypercrosslinked microporous resins (ZLYs) with intrinsic hydroxyl groups on the pore‐walls have been prepared by condensation of 1,3,6,8‐tetrakis(p‐formylphenyl)pyrene (TFPPy) with phloroglucinol (L1) or 1,5‐dihydroxynaphthalene (L2). The resulting porous networks exhibited high thermal stabilities and moderate Brunauer–Emmett–Teller surface area with 647 and 243 m2 g−1 respectively. The experiments showed that the weak interactions between CO2 and the intrinsic hydroxyl groups on the pore‐wall of the resins could enhance CO2 uptake and CO2/CH4 selectivity. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47448. Two hydrophobic pyrene‐based microporous organic polymers (ZLY‐s) were synthesized by tem‐plate–free condensation of 1,3,6,8‐tetrakis(p‐formylphenyl)pyrene (TFPPy) with phloroglucinol (L1) or 1,5‐dihydroxynaphthalene (L2). The intrinsic hydroxyl groups decorated within the pore‐wall have great influence on CO2 adsorption and selectivity. These polymers exhibit moderate CO2 uptake and CO2/N2 and CO2/CH4 selectivity, clearly demonstrating that advantageous materials properties can be obtained through CO2‐philic moieties incorporation