1. Department of Chemistry and CQ-VR, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal
2. Department of Physics and CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
3. Department of Chemistry, University of Minho, Gualtar, 4710-057 Braga, Portugal
4. CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa and CEMOP-UNINOVA, 2829-516 Caparica, Portugal