1. Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1, Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), 90040-060 Porto Alegre, Rio Grande do Sul, Brazil, Institute of Chemistry, State University of Campinas (Unicamp), 13083-970 Campinas, São Paulo, Brazil, and MILJØ-KEMI, Danish Environmental Center, LilleTornbjerg Vej 24a, DK-5220, Odense SØ, Denmark