Pore chemistry and size control in hybrid porous materials for acetylene capture from ethylene

The trade-off between physical adsorption capacity and selectivity of porous materials is a major barrier for efficient gas separation and purification through physisorption. We report control over pore chemistry and size in metal coordination networks with hexafluorosilicate and organic linkers for the purpose of preferential binding and orderly assembly of acetylene molecules through cooperative host-guest and/or guest-guest interactions. The specific binding sites for acetylene are validated by modeling and neutron powder diffraction studies. The energies associated with these binding interactions afford high adsorption capacity (2.1 millimoles per gram at 0.025 bar) and selectivity (39.7 to 44.8) for…

• WF
  Welch Foundation

  Award: AX-1730
• SF
  Science Foundation Ireland

  Award: 13/RP/B2549
• NN
  National Natural Science Foundation of China

  Awards: 21476192, 21222601, 21436010