Assembly of Zeolite-like Metal–Organic Framework: An Indium-ZMOF Possessing GIS Topology and High CO₂ Capture

Abstract

An In-ZMOF material, [(CH₃)₂NH₂][In(ABTC)]·3DMF (JLU-MOF52), has been synthesized by using 2,2',5,5'-azobenzenetetracarboxylic acid (H₄ABTC) as a linker, which coordinated to four [In(O₂C)₄]^- secondary building units (SBUs) to generate a 3D framework. JLU-MOF52 is constructed by a rare 4 + 4 strategy from 4-connected tetrahedral [In(O₂C)₄]^- SBUs and tetrahedral ligands, which can be described as a (4, 4)-connected and forbidden interpenetrated zeolite-like MOF with GIS topology. The framework exhibits significant advantages in terms of chemical stability. N₂ adsorption study of the activated JLU-MOF52 material reveals a Langmuir and a BET surface area is 1302 and 966 m² g^-1, respectively. Furthermore, the adsorption amount of CO₂ for JLU-MOF52 is studied under 1 atm, which exhibits the highest CO₂ capture ability at 273 K among the ZMOFs materials with GIS topology. These characteristics make JLU-MOF52 promising candidate materials for application in moderating increasing atmospheric CO₂ levels.