View More View Less
  • 1 Department of Chemistry, Faculty of Science, Zanjan University P. O. Box 45195-313, Zanjan, Iran
  • 2 Department of Chemistry, Faculty of Science, Zanjan University P. O. Box 45195-313, Zanjan, Iran
  • 3 Laboratoire de Chimie Inorganique Moléculaire, Université Louis Pasteur UMR 7513 CNRS, 1 Rue Blaise Pascal, F-67008 Strasbourg, France
Restricted access

Summary  

The extractive properties of 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis(diphenylphosphinoylmethoxy)calix[4]arene towards thorium(IV) and europium(III) ions are studied. The conventional log-log analysis of the extraction data reveals that the stoichiometry of the extracted species is 1 : 1 metal ion to ligand ratio for the two metals. The effects of ligand concentration, types of diluent and concentration of the salting-out agents are investigated and discussed. The selectivity of the ligand for thorium and europium ions versus Mn2+, Pb2+, Cd2+, Fe2+, Ni2+ and Co2+ is examined.