1. Department of Chemistry; Universidade Federal de Minas Gerais; Av. Pres. Antônio Carlos, 6627, Campus Pampulha CEP 31270-901 Belo Horizonte MG Brazil
2. Department of Chemistry; Universidade Federal de Viçosa; Av. Peter Henry Rolfs, s/n Campus Universitário CEP 36570-900 Viçosa MG Brazil
3. Department of Chemistry; Université Laval; Pavillon Alexandre-Vachon, 1045 Avenue de la Médecine G1V 0A6 Quebec City, Quebec Canada