1. Department of Physics, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
2. Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-UM2-ENSCM-UM1, Ecole Nationale Supérieure de Chimie de Montpellier, 8 rue de l’école normale, 34296 Montpellier Cedex 5, France
3. Department of Chemistry, CQ-VR, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal