Metal complexes that transport electrons across liquid membranes

G. De Santis, A. Poggi, B. Seghi, L. Fabbrizzi
1990 Pure and Applied Chemistry  
Absrracr Lipophilic metal complexes, displaying one electron redox activity, are used as carriers for the transport of electrons across bulk liquid membranes from an aqueous reducing phase to an aqueous oxidizing phase. The [FeIII,lI(bpy)313+/2+ redox system (bpy = 4,4'-di-rerr-butyl-2,2'dipyridyl, 1) transports electrons from both cationic and anionic aqueous reducing agents to aqueous Ce(1V) and counter-transports perchlorate ions in the opposite direction. Electron/chloride ion cross
more » ... e ion cross transport between aqueous persulfate and aqueous metal centred reducing agents, mediated by the membrane dissolved [Ni1r**11LC12]2+/3+ redox system (L =(N-cety1)-cyclam, 2) takes place at a much higher rate. The overall transport rate in the two types of experiments is controlled by that of the redox process occurring at the membrane/aqueous reducing phase interface and is to be related to the type of mechanism (inner or outer sphere) by which the two-phase electron transfer process takes place.
doi:10.1351/pac199062061119 fatcat:ni2fw6bo2jcdxckasj7t2y45r4