A mesoporous (3,36)-connected txt-type metal–organic framework constructed by using a naphthyl-embedded ligand exhibiting high CO2 storage and selectivity

Abstract

A highly mesoporous (3,36)-connected txt-type metal–organic framework, termed HHU-1, with a naphthalene-embedded ligand was successfully synthesized. HHU-1 exhibits a BET surface area of 2290 m² g⁻¹ and a high pore volume of 1.33 cm³ g⁻¹. Due to the conjugation effect induced by the naphthyl of ligands, acylamide groups stretching into pores contribute to a comparably higher CO₂ adsorption enthalpy (27.7 kJ mol⁻¹), which endows HHU-1 with a high CO₂ storage capacity (1071 mg g⁻¹ at 40 bar) as well as high selectivity (CO₂ : N₂ = 140).