1. Research Unit “Molecular Physical-Chemistry”, University of Coimbra, 3000 Coimbra, Portugal
2. ISIS Facility, The Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, UK
3. Department of Life Sciences, Faculty of Science and Technology, University of Coimbra, Apartado 3046, 3001-401 Coimbra, Portugal