Adsorption of diprotonated cryptand [2.2.2.] on the mercury electrode

The adsorption behavior of diprotonated cryptand 2.2.2.] (DPCR), which represents a two-charged complex with one proton localized inside the ligand intramolecular cavity and the other proton localized on the external surface of the ligand molecule at the nitrogen atom, is studied at the Hg electrode/aqueous solution interface by the impedance method. The obtained data indicate the presence of tem-poral processes of the reconstruction of the DPCR adsorption layer, which depend on the potential of the onset of adsorption and on the cryptand 2.2.2.] concentration.