1. Laboratory of Physical Chemistry and Environmental Chemistry, Department of Chemistry, ICEB, Federal University of Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto 35400-000, Minas Gerais, Brazil
2. Department of Physical Chemistry, Institute of Chemistry, University of Campinas, UNICAMP, Campinas 13084-862, São Paulo, Brazil
3. Department of Chemistry, Institute of Natural Sciences, Federal University of Lavras, Campus Universitário, P.O. Box 3037, Lavras, Minas Gerais 3037, Brazil