1. Department of Chemistry, Federal University of Viçosa, Avenida P. H. Rolfs, CEP 36570-000 Viçosa, MG, Brazil
2. Department of Life Science and Biotechnology, University of Ferrara, via L. Borsari 46, I-44121 Ferrara, Italy
3. Department of Inorganic Chemistry, Federal University Fluminense, Outeiro de São João Batista s/n, Centro, CEP 24020-141 Niterói, RJ, Brazil