Reduced Molybenum-Oxide-Based Core–Shell Hybrids : “Blue” Electrons Are Delocalized on the Shell
A. M. Todea, J. Szakács, S. Konar, H. Bögge, D. C. Crans, T. Glaser, H. Rousselière, R. Thouvenot, P. Gouzerh and A. Müller, Chem. Eur. J., 2011, 17, 6635–6642.

Competition for electrons : In metal-oxide-based core–shell hybrids, in which the core (Keggin ion) as well as the shell (Keplerate cluster) can both easily be reduced, the electrons appear preferably delocalized on the shell.

 Unprecedented and Differently Applicable Pentagonal Units in a Dynamic Library : A Keplerate of the Type {(W)W₅}₁₂{Mo₂}₃₀
C. Schäffer, A. Merca, H. Bögge, A. M. Todea, M. L. Kistler, T. Liu, R. Thouvenot, P. Gouzerh, A. Müller, Angew. Chem. Int. Ed., 2009, 149-153.

Magic pentagons : Exploitation of versatile pentagonal units/ligands has previously led to giant molybdenum oxide based curved species, including spherical Keplerates. Similar methodology is now also applicable to the related tungstate scenario (see corresponding basic central pentagonal unit in green).

 Vectorial growth/regulations in a {P₈W₄₈}-type polyoxotungstate compartment : trapped unusual molybdenum oxide acts as a handle
F. L. Sousa, H. Bögge, A. Merca, P. Gouzerh, R. Thouvenot, A Müller, Chem. Commun., 2009, 7491-7493.

Reaction of the cyclic {P₈W₄₈} polyoxotungstate host with sodium molybdate in solution in the presence of a reducing agent leads to the formation and stabilization of unprecedented neutral {Mo^V₄O₁₀(H₂O)₃} aggregates with handle function, thereby proving the potential of the present host for performing future interesting studies related to mixed-valence type chemistry under confined conditions.