1. Laboratory of Molecular Catalysis-Institute of Chemistry-UFRGS-Avenida Bento Gonçalves, 9500 Porto Alegre 91501-970 RS Brazil; Universidade de Caxias do Sul, Departamento de Engenharia Química, Rua Francisco Getúlio Vargas, 1130, Caxias do Sul 95070-560, RS-Brazil, and Laboratory of Biomimetic Catalysis, Chemistry Department, UFSC-Santa Catarina South Carolina 88040-900, Brazil