NMR Study of the Reversible Trapping of SF6 by Cucurbit[6]uril in Aqueous Solution

Luca Fusaro, Emanuela Locci, Adolfo Lai & Michel Luhmer
The complexation of sulfur hexafluoride (SF6), a highly potent greenhouse gas, by cucurbit[6]uril (CB) was studied at various temperatures in Na2SO4 aqueous solutions by 19F and 1H NMR. CB shows a remarkable affinity for SF6, suggesting that it is a suitable molecular container for the design of materials tailored for SF6 trapping. At 298 K, the equilibrium constant characterizing the inclusion of SF6 by CB is 3.1 × 104 M−1 and the residence time of...
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