Journal
INORGANIC CHEMISTRY
Volume 47, Issue 5, Pages 1411-1413Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic7020885
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The diffusion coefficient of the self-assembled supramolecular cluster [Ga4L6](12-) depends on the cationic counterions in solution. Diffusion coefficients were determined using the pulsed-gradient spin-echo H-1 NMR method and fit using nonlinear least-squares refinement. Saturation studies revealed a small number of ion-association sites on the exterior of the assembly and the direct observation of ion association in water. The addition of excess alkali-metal cations displaces the ion-associated hydrophobic tetraalkylammonium cations. Comparisons between tetraethyl- and tetrapropylammonium show a preference for ion association with the more hydrophobic cation.
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