The Synergistic Extraction of Lanthanide Ions by a Mixture of Calix[4]resorcinarene or its Dimethylamino-, Piperidyl- or Trimethylammoniummethylated Derivatives and 1,10-Phenanthroline in n-Heptanol

摘要: The alkylaminomethylatedcalix[4]resorcinarene derivatives, modified bydimethylamino-, piperidyl- and trimethylammoniummoieties, have been synthesised to investigate theirextractability towards lanthanide ions comparewith the extractability of calix[4]resorcinarene. Both calix[4]resorcinarene its derivatives beenshown synergistically affect ionextraction from neutral aqueous solutions by1,10-phenanthroline through outer-sphere interactionof bis-phenanthrolinate cations withdeprotonated forms Thederivatives with dimethylamino- andpiperidylmethylated moieties are shown be moreeffective extractants in comparison theunsubstituted one.