Supramolecular Transport of Metal Ammine and Amine Complexes Through Chloroform Membranes by the Natural Ionophore Lasalocid A. The Selective Enantiomeric Transport of Chiral Metal Complexes

The naturally occurring polyether antibiotic lasalocid A acts as a carrier for the transport of inert ammine and amine complexes of Co(III) and Pt(IV) from an aqueous source phase to an aqueous receiving phase across a chloroform membrane. For such systems, «uphill» transport occurs in the presence of a counter gradient of ammonium ions. Thus, under the conditions employed, the transport of the hexaamminecobalt (III) ion across the chloroform membrane phase proceeds to completion over 148 h