Outer‐Sphere Coordination Chemistry: Selective Extraction and Transport of the [PtCl₆]²⁻ Anion

Abstract

What's on the outside? Selective extraction and transport of [PtCl6]2− from aqueous acidic solutions in the presence of excess chloride has been demonstrated through outer-sphere coordination of the metalloanion by tripodal polyamide and polyurea receptors (see picture; Pt purple, N blue, O red, Cl green). Loading and stripping of the organic phase can be controlled by variation of the pH value of the aqueous solution.