1. São Carlos Institute of Chemistry, University of São Paulo, P.O. Box 369, 13560-970 São Carlos, São Paulo, Brazil
2. Department of Chemistry - Ångström Laboratory, Uppsala University, Box 538, 75121 Uppsala, Sweden
3. Institute of Chemistry, Federal Fluminense University−Outeiro de São João Batista, s/n
CEP:24020-141 Niterói, RJ, Brazil