Perfluorinated phosphine oxide and sulfides as extractants for heavy metals and radionuclides

Perfluorinated oxygen- and sulfur-containing compounds as extractants for gold(III)

“…Compound 2, whilst soluble in FC-72 does not have high solubility in organic solvents. We have previously reported on the synthesis of the sulfur analogue, 3, and this displays almost no solubility in any organic or fluorous solvent [12,13]. We have previously shown the utility of 4 in extracting a series of metals from aqueous solution under solid phase-liquid phase conditions, and the sulfur analogue would be of interest in gold extractions as it is a softer donor.…”

“…Whilst perfluoroalkyl and aryl phosphines have been examined, the corresponding perfluorophosphine oxides have only briefly been described in the literature as intermediates in the synthesis of the phosphines [10,11], and no coordination chemistry has been reported. We have been investigating the use of these perfluorinated analogues of TOPO for extraction of a number of metals and radioisotopes from water into fluorinated solvents [12,13], and the use of perfluorinated phenols for the removal of a number of radionuclides from water [14]. We have also exploited the unique solubility properties of fluorous ketones in the removal of a number of heavy metals from water [15].…”

“…Cumulative error including the counting error leads to an experimental average error uniformly taken to be±5%. The l i g a n d s { C F 3 ( C F 2 ) 5 [12,13] were prepared via the literature method. Perfluorohexane (FC-72) was obtained from Acota and distilled before use.…”

Straightforward Solvent‐Free Synthesis of Tertiary Phosphine Chalcogenides from Secondary Phosphines, Electron‐Rich Alkenes, and Elemental Sulfur or Selenium

“…The accessibility of the starting materials and their potential structural diversity as well as excellent isolated yields and high chemo‐ and regioselectivity of this reaction allow it to be considered as one of the most efficient methods for preparation of various tertiary phosphine chaclogenides. The latter are useful precursors and stabilizing agents for nanoparticles , prospective extractants of noble metal ions , and ligands for metal complexes .…”

“…Tertiary phosphine sulfides and selenides constitute an important class of organophosphorus compounds . They are widely used as popular precursors and stabilizing agents for semiconductive nanoparticles , extractants of noble metal ions , versatile ligands for metal complexes (including catalysts ) as well as reagents for organic synthesis . In addition, tertiary phosphine sulfides are offered as additives to electrolytes , modifiers for rubbers , and sensitizers in photographic materials .…”