International Summer School PROGRAM - Laboratoire d'Infochimie ...

Synthesis, characterizations and applications of cyclic
oxothiomolybdenum rings
Sébastien Floquet, Akram Hijazi, Justin Kemmegne-Mbouguen, Jérôme Marrot
and Emmanuel Cadot
Institut Lavoisier de Versailles, UMR 8180, Université de Versailles, 45 av. des Etats Unis, 78035
Versailles, France. sebastien.floquet@chimie.uvsq.fr, cadot@chimie.uvsq.fr
In the last decade, we have derived the first members of a new family of
polyoxometalates (POM) compounds, the cyclic polyoxothiomolybdates, and started
exploring their properties. This fascinating class of compounds results from the selfcondensation
of [Mo2O2S2(H2O)6] 2+
building blocks around various types of ligands.
Among these ligands, the tremendous propensity of the Mo-rings to encapsulate
polycarboxylate anions as guest components allowed us to obtain a wide family of Morings
differing by their shape, their size and their charge. In the present contribution, we
will present the synthesis of some of these supramolecular compounds with a particular
attention for NMR characterizations and studies in solution and their electro-catalytic
properties toward the reduction of protons into hydrogen.
B. Salignac, S. Riedel, A. Dolbecq, F. Sécheresse, E. Cadot, J. Am. Chem. Soc., 2000, 122, 10381;
J.-F. Lemonnier, S. Floquet, J. Marrot, E. Terazzi, C. Piguet, P. Lesot, A. Pinto and E. Cadot,
Chem. Eur. J., 2007, 13, 3548; B. Keita, S. Floquet, J.-F. Lemonnier, E. Cadot, A. Kachmar, M.
Bénard, M.-M. Rohmer, L. Nadjo, J. Phys. Chem. C, 2008, 112, 1109-1114 ; S. Floquet, S. Brun,
J.-F. Lemonnier, M. Henry, M.-A. Delsuc, Y. Prigent, E. Cadot and F. Taulelle, J. Am. Chem. Soc.,
2009, 131, 17254-17259 ; S. Duval, S. Floquet, C. Simonnet-Jégat, J. Marrot, R. Ngo Biboum, B.
Keita, L. Nadjo, M. Haouas, S. Brun, F. Taulelle and E. Cadot, J. Am. Chem. Soc., 2010, 132,
2069-2077 ; J.-F. Lemonnier, S. Duval, S. Floquet, E. Cadot, Isr. J. Chem., 2011, 51, 290-302
(review).