1. Chemistry Center and Chemistry Department; University of Minho; 4710-057 Braga Portugal
2. Department of Chemistry; University of Trás-os-Montes e Alto Douro; 5001-801 Vila Real Portugal
3. IQSC; University of São Paulo; Av. Trabalhador Sãocarlense 400 13566-590 São Carlos SP Brazil
4. CQ-VR; University of Trás-os-Montes e Alto Douro; 5001-801 Vila Real Portugal