Remarkable acidity independent actinide extraction with a both-side diglycolamide-functionalized calix[4]areneElectronic supplementary information (ESI) available: Synthesis of L-I and L-II, solvent extraction data, etc. See DOI: 10.1039/c3dt50557j

A novel solvent system containing a newly synthesized both-side diglycolamide-functionalized calix[4]arene ( L-I ) in a room temperature ionic liquid showed highly efficient extraction of actinides and a remarkable acid concentration independent extraction of trivalent actinide ion, Am 3+ suggesting its possible use for high level radioactive waste remediation. The nature of the complexes was ascertained by slope analysis, luminescence spectroscopic investigations and from the thermodynamic parameters. The sustainability of the solvent system for long term applications was also investigated. A novel both side diglycolamide-functionalized calixarene was used in ionic liquid for a remarkably efficient extraction of actinide ions, especially, Am 3+ .