1. Department
of Chemistry, Pavillon Alexandre-Vachon, Université Laval, 1045 Avenue de la Médecine, Quebec
City, Quebec G1V 0A6, Canada
2. Department
of Chemistry, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Av. Pres. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, 31270-901, MG, Brazil