[1] Univ Paris 06, CNRS URA 2056, Lab Physicochim Biomol & Cellulaire, F-75252 Paris 05, France
[2] CNRS, Spectrochim Infrarouge & Raman Lab, UPR 2631, F-94320 Thiais, France
[3] Charles Univ Prague, Inst Phys, CR-12116 Prague 2, Czech Republic
[4] Univ Grenoble 1, CNRS URA 332, Etud Dynam & Struct Select Lab, F-38041 Grenoble, France
[5] Inst Rech Catalyse, F-69626 Villeurbanne, France
[6] Inst Biol Physicochim, F-75231 Paris 05, France
[7] Ecole Normale Super, Lab Radioastron Millimetr, F-75231 Paris 05, France