1. Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
2. Instituto de Física da Universidade de São Paulo, Rua do Matão 1371, 05508-090 São Paulo, SP, Brazil
3. Department of Chemistry, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark