1. Chemistry Department, Federal University of Sao Carlos, Rod. Washington Luis, km 235, Sao Carlos, 13565-905, Brazil
2. Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, 00560, Finland
3. Institute of Chemistry, State University of Campinas, ZIP code 13083-970, Campinas, SP, Brazil
4. Institute of Physics “Gleb Wataghin”, State University of Campinas, 13083-859, Campinas - SP, Brazil