Diels–Alder cycloaddition polymerization for porous poly-phenylenes with exceptional gas uptake properties

Abstract

We report the synthesis of two-dimensional and three-dimensional porous polyphenylenes (2D/3D-pPPs) via the Diels–Alder cycloaddition polymerization reaction. The resulting 2D and 3D-pPPs showed surface areas up to 1553 m² g⁻¹, pore volumes of 1.45 cm³ g⁻¹ and very high H₂ uptake capacities of 7.4 and 7.1 wt% at 77 K, respectively, along with a competitive high-pressure CO₂ and CH₄ uptake performance.