1. CIQUP/Department of Chemistry and Biochemistry, Faculty of Sciences; University of Porto; Porto 4169-007 Portugal
2. FP-ENAS-Faculty of Health Sciences; University Fernando Pessoa; Porto P-4200-150 Portugal
3. REQUIMTE/Department of Chemistry and Biochemistry, Faculty of Sciences; University of Porto; Porto 4169-007 Portugal
4. Department of Chemistry; University of Aberdeen; Aberdeen AB24 3UE UK