1. Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
2. REQUIMTE/Department of Chemistry and Biochemistry, Faculty of Science, University of Porto, 4169-007 Porto, Portugal
3. Unit of Chemical and Radiopharmaceutical Sciences (UCRS), Nuclear and Technological Institute, Estrada Nacional 10, 2686-953 Sacavém, Portugal
4. Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.