"Nanoobjects" by Self-Assembly Concomitant with Modifications under Alterable Boundary Conditions: Incorporation of Paramagnetic Metal Centers (Cu2+ ) in Ring-Shaped Molybdenum-Oxide Based Clusters.

Are adaptations in the nanocosmos observable? Or in other words, can formation or self-assembly of nanoparticles be achieved with a variety of characteristic modifications of a parent structure based solely on the variation of boundary conditions? This possibility exists for the ring-shaped nanostructured giant molybdenum clusters-known as "big wheels"-in which well-defined transformations and reactions can be observed at various well-defined positions on the surface and even internally. The integration of magnetic copper centers into cavities (violet tetrahedra) of exactly the right size is described.