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Unique Spheres and Magnetism: Spherical extremely stable capsules of the type {(Mo)Mo5}12{M}30 can be directly synthesized by the addition of linkers M - such as VIVO2+, CrIII and FeIII - to a dynamic library containing {(Mo)Mo5} pentagonal units in solution. In the {M30} situation - the related Archimedean solid has equal distances ! - a network of corner-sharing triangles exists on the sphere surface. This gives rise to spherical systems with magnetic centers of the type s = 1/2, 3/2 and 5/2, and in the [Mo72Fe30] case, to a unique geometrically frustrated magnetic system.
A. Müller, A.M. Todea, M. Dressel, J. van Slageren, H. Bögge, M. Schmidtmann, M. Luban, L. Engelhardt, M. Rusu, On Triangular Geometrical and Magnetic Motifs Uniquely Linked on a Spherical Capsule-Surface, Angew. Chem. Int. Ed. 44 (2005) 3857 - 3861. [mehr ..]