[1] Grenoble High Magnetic Fld. Lab., MPI-CNRS UPR 5021, BP 166, 38042 Grenoble Cedex 9, France
[2] Lab. Electro. Org./Photochim. Redox, Université Joseph Fourier, Inst. de Chim. Molec. de Grenoble, 38054 Grenoble Cedex, France
[3] DRFMC-Serv. de Chim. Inorg. et Biol., Lab. Coordination et Chiralite, UMR CEA-CNRS-UJF 5046, 38054 Grenoble Cedex, France