Acid/base controllable complexation of a triptycene-derived macrotricyclic host and protonated 4,4'-bipyridinium/pyridinium salts.

A new acid/base controllable host-guest system based on a triptycene-derived macrotricyclic host and protonated 4,4'-bipyridinium/pyridinium salts was developed. Moreover, the competition complexation process between the host and two different kinds of 4,4'-bipyridinium salts could also be chemically controlled by acid and base.

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