Allosteric Binding of Halide Anions by a New Dimeric Interpenetrated Coordination Cage


  • This work was supported by the CaSuS program of the state of Lower Saxony.


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Packed in like sardines: Three BF4 ions are packed into the three cavities of an interpenetrated dimer of a coordination cage (see scheme). While the inner BF4 ion is tightly bound inside the central position, the loosely bound outer anions can be replaced with halide anions by an allosteric binding mechanism and a concerted structural change. In particular, Cl is bound with great affinity.