1. Centro de Química, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
2. INESC TEC – Institute for Systems and Computer Engineering, Technology and Science and FCUP – Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
3. Department of Physics, School of Sciences and Technology, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal