1. Department of Chemical Sciences University of Catania V.le A. Doria 6 95125 Catania Italy
2. I.N.S.T.M. UdR of Catania University of Catania V.le A. Doria 6 95125 Catania Italy
3. C.I.R.C.C. (Interuniversity Consortium in Chemical Reactivity and Catalysis) UdR of Catania University of Catania V.le A. Doria 6 95125 Catania Italy
4. Faculty of Engineering Østfold University College P.O. Box 700 1757 Halden Norway
5. Institute of Polymers Composites and Biomaterials National Research Council (IPCB-CNR) Via P. Gaifami 18 95126 Catania Italy
6. Institute for Chemical and Physical Processes CNR-IPCF V.le F. Stagno d'Alcontres 37 98158 Messina Italy