1. Unidade de I&D Química-Física Molecular, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
2. Departamento de Química-Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain
3. Department of Life Sciences, University of Coimbra, 3000-456 Coimbra, Portugal