Super Uranophiles: Application to Highly Effective Solvent Extraction of Uranyl Ion in the Presence of Methyltrioctylammonium Chloride

By using hydroxycalix[n]arene-p-sulfonates, Hj1nn (n = 6 and 8) known as super uranophiles, uranyl ion, UO22+, in aqueous solution was efficiently extracted by chloroform in the presence of methyltrioctylammonium chloride, MTA+Cl. The extracted species were found to be the ionic associates, [(UO22+)(168)(H+)3](MTA+)9 and [(UO22+)2(1812)(H+)3](MTA+)11