Electrochemically controlled binding of bis-P,P-chelate platinum(II) dication to 3,7-di(2-pyridyl)-1,5-diphenyl-1,5-diaza-3,7-diphosphacyclooctane complex and ferrocyanide ion with tetraviologen calix[4]resorcinol

Two new types of systems with an electrochemically controlled binding of electron-accepting particles with tetra(methyl viologen) calix[4]resorcinol MVCA-C-5 (8+) were developed. Control is carried out by the reversible reduction of viologen units. In one of the systems, an equimolar amount of the dication of bis-P,P-chelate platinum(II)-3,7-di(2-pyridyl)-1,5diphenyl-1,5-diaza-3,7-diphosphacyclooctane complex ([PtL1 (2)](2+)) is bound by the reduced form MVCA-C-5 (0) and is not bound to the octacation MVCA-C-5 (8+) and tetra(radical cation) MVCA-C-5 (4+aEuro cent). In another ternary system MVCA-C-5 (8+)-[PtL1 (2)](2+)-[Fe(CN)(6)](3-), the reversible switching occurs from the original unbound state to the state with selective binding of equimolar amounts of [Fe(CN)(6)](4-) or [PtL1 (2)](2+) by calixresorcinol. Supramolecular complexes form insoluble associates in both systems.