1. Department of Chemistry; University of Bath; Claverton Down BA2 7AY Bath UK
2. Centro de Engenharia Biológica and Departamento de Química; Universidade do Minho; Campus de Gualtar 4710-057 Braga Portugal
3. Central Laser Facility; Rutherford Appleton Laboratory; Research Complex at Harwell; STFC; Didcot OX11 0QX UK