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Keywords:

  • Adsorption;
  • Host-guest systems;
  • Hybrid materials, inorganic–organic;
  • Hydrogen bonding;
  • Nanoporous materials
Thumbnail image of graphical abstract

The unusual adsorption behavior of CO2 in a nanoporous hybrid metal– organic solid is discussed (see figure). The results indicate that the gas adsorption–desorption step is related to a breathing phenomenon. This study also suggests that the main interactions responsible for the breathing phenomenon are strong guest–framework CO2–OH interactions as well as CO2–CO2 interactions along the tunnels present in the structure.