CONSTRUCTION OF TEMPLATE LIGAND SITES IN POLYMERIC MATRICES WITH DITHIZONE

Metal ion specific template ligand sites were developed by physically immobilizing dithizone molecules oriented according to a particular co mplex geometry in various polymeric films. Four polymeric systems, pol ystyrene, poly(methyl methacrylate), poly(vinyl chloride), and polycar bonate, were used for making template sites for Cu2+, Ni2+, Zn2+, and Co2+ ions. A high degree of specificity could be achieved independent of stability constants, though about half of the ligand sites were una vailable to the metal ions. (C) 1997 John Wiley & Sons, Inc.