1. REQUIMTE, UCIBIO, LAQV, Dep. Química, Fac. Ciências e Tecnologia, UNL, 2829‐516 Caparica (Portugal)
2. Institute of Chemistry, UFRGS, Av. Bento Gonçalves 9500, 91501‐970 Porto Alegre, RS (Brazil)
3. PUCRS, Fac. Química, BR‐90619900 Porto Alegre, RS (Brazil)
4. PETROBRAS/CENPES, 21941‐915 Rio de Janeiro, R.J. (Brazil)
5. School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD (UK)