Size-selective sorption is exhibited by a zeotype organic–inorganic ionic crystal with 1D channels: the guest-free phase sorbs water and methanol, while larger molecules are excluded. Moreover, K+ ions, which reside in the channels (see picture; O red, C black, H pink, N blue), can be exchanged with other alkali metal ions, and the guest sorption properties depend on the type of alkali metal ions.
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Uchida et al. (2010) studied this question.
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