Institution: | (1) Universidade Federal de Ouro Preto, Chemistry Department & Universidade Federal de Minas Gerais, Education Post-graduation Programme, Ouro Preto, Brazil;(2) Universidade Federal de Minas Gerais, Chemistry Department & Education Post-graduation Programme, Belo Horizonte, Brazil;(3) Universidade Federal de Minas Gerais, Chemistry Department, Av. Ant?nio Carlos 6627, 31270-901 Belo Horizonte, Brazil;; |