Figure 1 (IMAGE)

Kanazawa University

Figure 1

Caption

(a) Structure of a crown ether (18-crown-6), which can capture a metal ion in the cavity. (b) A bottle with a cork. We cannot put in and take out an object inside the bottle when tightly closed, but we can do so when a loose stopper is used. (c) Metallohost with caps. (i) The host can capture a guest cation in the central crown-ether-like cavity, and (ii) the caps (anions) can be introduced above and below the cavity.

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Kanazawa University

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