1. Graduate
Program in Materials Science and Engineering, Technology Development
Center, Federal University of Pelotas, 96010-000 Pelotas, Rio Grande do Sul, Brazil
2. Chemistry,
Pharmaceutical and Food Science Center, Federal University of Pelotas, 96160-000 Capão do Leão, Rio Grande do Sul, Brazil
3. Department
of Physical Chemistry, Institute of Chemistry, São Paulo State University, 14800-900 Araraquara, São
Paulo, Brazil
4. Department
of Chemistry, Institute of Exact and Biological Sciences, Federal University of Ouro Preto, 35400-000 Ouro
Preto, Minas Gerais, Brazil