[1] Univ Barcelona, Dept Quim Fis, E-08028 Barcelona, Spain
[2] Ecole Natl Super Chim Paris, CNRS, UMR 7575, F-75231 Paris, France
[3] Univ Federico II Complesso Univ Monte St Angelo, Dipartimento Chim, I-80126 Naples, Italy
[4] Univ Florence, Dipartimento Chim, Polo Sci, I-50019 Florence, Italy
[5] Univ Groningen, Ctr Mat Sci, NL-9747 AG Groningen, Netherlands
[6] SERC, Daresbury Lab, CCLRC, Warrington WA4 4AD, Cheshire, England
[7] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AY, England
[8] Univ Barcelona, Dept Quim Fis, E-08028 Barcelona, Spain
[9] Univ Toulouse 3, Phys Quant Lab, IRSAMC, F-31062 Toulouse, France