1. Department
of Chemistry, Universidade Federal do Paraná, PO Box 19032, 81531-980 Curitiba - PR, Brazil
2. Institut
de Chimie de Clermont-Ferrand, Université Clermont Auvergne, Université Blaise Pascal, BP 10448, F-63000 Clermont-Ferrand, France
3. CNRS, UMR 6296, F-63178 Aubière, France