1. Institute of Chemical Research of Catalonia (ICIQ), Avda. Països Catalans, 17. 43007 Tarragona (Spain), Fax: (+34) 977920231
2. Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439 (USA)
3. Sandia National Laboratories, Albuquerque, NM 87185 (USA)
4. Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel⋅lí Domingo, s/n. 43007 Tarragona (Spain)