A. Müller, F. L. Sousa, A. Merca, H. Bögge, P. Miró, J. A. Fernández, J. M. Poblet, C. Bo
Angew. Chem. Int. Ed. 2009, 48, 5934-5937
Abstract: A strongly nucleophilic cluster surface allows the selective complexation and separation of ammonium and potassium ions. Six {Mo4VKO6} rings with crown-ether-like functionality (see picture; Mo blue, V green, K pink, O red) present in the holes of the investigated cluster complex integrate six ammonium ions (N orange, H yellow).