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Keywords:

  • adsorption;
  • host–guest systems;
  • ionic crystals;
  • solid-state structures;
  • X-ray diffraction
Thumbnail image of graphical abstract

Dynamic accommodation: The racemic crystal of (±)-[Co(en)3]Cl3 (en=ethylenediamine; see space-filling model of lattice: Co red, N blue, Cl green, C gray) includes H2O molecules within the one-dimensional channels when hydrated. Upon removal of the H2O molecules by vacuum drying, the crystal exhibits dynamic behavior as a host to a variety of light gases or organic vapors within its channels by expansion/contraction of the lattice while single-crystal properties are maintained.