1. Chemistry Institute, University of Campinas, Campinas 13083-872, Brazil
2. Grupo de Pesquisa em Fotoquímica Orgânica Aplicada, Universidade Federal do Rio Grande do Sul, Porto Alegre CEP 91501-970, Brazil
3. Chemistry Institute of São Carlos, University of São Paulo, São Carlos 13565-905, Brazil
4. Department of Physics and Chemistry, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul 97105-900 Brazil
5. Center for Information Technology Renato Archer−CTI, Campinas 13069-901, Brazil