The Potassium Binding Ligand Nonactin


For transport, alkali ions are bound by special ligands. These are generally heterocyclic oligopeptides, which often show a remarkable ion selectivity.

One example is nonactin, which binds potassium with the coordination number 8.

The ligand

The potassium complex

The crown ethers are suitable model compounds for the size-selective coordination of singly charged cations.