Gas-Conforming Transformability of an Ionic Single-Crystal Host Consisting of Discrete Charged Components



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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.