1. Department of Chemistry, University of Naples ‘‘Federico II’’, Complesso di Monte S. Angelo, Via Cinthia, I-80126 Naples, Italy
2. Istituto di Biostrutture e Bioimmagini, CNR, Naples, Italy
3. CSGI (Consorzio per lo Sviluppo dei Sistemi a Grande Interfase), Florence, Italy
4. Department of Pharmaceutical Science, University of Salerno, Fisciano, Italy
5. Department of Chemistry, University of Siena, Siena, Italy
6. Institut Laue-Langevin, Grenoble, France