title: Synergistic Ion-pair Extraction of Strontium Ion with Tri-n-octylphosphine Oxide and Dicyclohexano-18-crown-6.
abstract: The co-use of two neutral ligands, tri-n-octylphosphine oxide (TOPO) and dicyclohexano-18-crown-6 (DC18C6), for ion-pair extraction of divalent strontium (Sr2+) with bis(trifluoromethanesulfonyl)imide anion (Tf2N-) showed unique synergistic effect. The extracted species in use of a single ligand is Sr(TOPO)32+·2Tf2N-or Sr(DC18C6)2+·2Tf2N-, whereas the co-use resulted in extraction enhancement based on additional formation of Sr(DC18C6)(TOPO)2+·2Tf2N-and Sr(DC18C6)(TOPO)22+·2Tf2N-.
authors.affiliation: Department of Chemistry, Faculty of Science, Toho University.
authors.forename: Mami
authors.initials: M
authors.lastname: Onizaki
authors.forename: Kotaro
authors.initials: K
authors.lastname: Morita
authors.forename: Naoki
authors.initials: N
authors.lastname: Hirayama