Coordination and supramolecular assemblies of K+/Ln3+ to perhydroxycucurbit[5]uril in the presence of [PMo12O40]3−: potential application in isolation of light lanthanides

Coordination of Ln3+ Ions to Perhydroxycucurbit[5]uril and the Formation of Supramolecular Self‐Assemblies in the Presence of [SiW12O40]4– Anions and Transition Metal Salts – Potential Application in the Isolation of Light Lanthanides

“…Our experimental results proved that interactions between (HO) 10 Q [5] and the [PMo 12 O 40 ] 3anion not only result in hybrid supra-molecular assemblies [17] but could also be useful for the isolation of lanthanides in aqueous solutions. [18] Our results also revealed that the (HO) 10 In the present work, the interactions in (HO) 10 Q[5]-Ln 3+ -[SiW 12 O 40 ] 4systems are investigated ( Figure 1). The coordination and assembly of lanthanides cations with (HO) 10 Q [5] in the presence of [SiW 12 O 40 ] 4anions and transition metal salts show significant differences with increasing lanthanide atomic number.…”

Advances in the lanthanide metallosupramolecular chemistry of the cucurbit[n]urils

“…Recently, it has been demonstrated that the reaction of perhydroxycucurbit [5]uril {(HO) 10 Q[5])} with a selection of Ln 3+ ions in the presence of K + and the polyoxometallate anion [PMo 12 O 40 ] 3− (as structure inducer) again results in recognition and structural discrimination between light and heavy La 3+ ions [86]. As before, three structural groups were isolated from different regions along the lanthanide series ( Fig.…”

“…9. Representative X-ray crystal structures: (a) K + -Ln 3+ -(HO)10Q [5] heterometallic molecular capsules with Ln = La, Ce showing the included chloride ion; (b) K + -Ln 3+ -(HO)10Q [5] heterometallic molecular capsules with Ln = Nd, Sm, Eu showing the included chloride ion; (c) the K + -(HO)10Q [5] molecular capsule with an included nitrate anion (prepared in the presence of Dy 3+ , Ho 3+ , Lu 3+ or Er 3+ ); (d) the K + -(HO)10Q [5] molecular capsule encapsulating a water molecule (prepared in the presence Tm 3+ , Yb 3+ or Lu 3+ ); (e)-(g) three representative crystal packing arrangements for assemblies from the first, second and third product groups, respectively; (h) and (i) specific interactions between the (HO)10Q [5]-based complexes and the [PMo12O40] 3− anions [86]. the cavity of the Q [6] and is disordered between two positions (Fig.…”

Adducts of aqua complexes of Ln3+ with a symmetrical octamethyl-substituted cucurbituril: potential applications for isolation of heavier lanthanides

“…Q [7]/Ln 3þ -based supramolecular assemblies have been used as solid coatings on solid-phase microextraction fibres (20). Moreover, the coordination or interaction of Q[n ]s with Ln 3þ or their complexes may be used for the recognition and isolation of lanthanide (cations) (14,18,21,22) and so on.…”