1. School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK
2. Department of Physics, King's College London, Strand, London, WC2R 2LS, UK
3. Institute of Organic Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, 1090, Vienna, Austria
4. Elettra – Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, 34149 Basovizza, Trieste, Italy