Interfacial transfer of Cd~(2+) assisted by 4'- morpholino-acetophenone-4-phenyl-3- thiosemicarbazone across the water/1,2- dichloroethane interface

摘要

The assisted transfer of heavy metal ions by interfacial complexation with 4'-morpholinoacetophenone-4-phenyl-3-thiosemicarbazone (MAPPT) at the interface between two immiscible electrolyte solutions (ITIES) was studied by cyclic voltammetry. The voltammograms obtained across the water/1,2-dichloroethane interface using the MAPPT ligand in the organic phase shows that the assisted metal ion transfers have different nature for different ions. The quasi-reversible voltammetric peak of the Cd~(2+) ion was obtained and is discussed in detail. The dependence of the half-wave transfer potential on MAPPT concentration showed that the equilibrium is effectively displaced towards a 1:3 (metal:ligand) stoichiometry with an association constant of logβ~0 =15.46 (±0.11) for the Cd~(2+) ion, corresponding to the TIC/TID mechanism.