1. School of Chemistry, Trinity College Dublin, Dublin 2, Ireland
2. School of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, UK
3. School of Chemistry, University College Dublin, Dublin 4, Ireland
4. Trinity Biomedical Sciences Institute, The University of Dublin, Pearse St., Dublin 2, Ireland
5. STFC Central Laser Facility, Research Complex at Harwell, Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
6. School of Chemical Sciences, Dublin City University, Dublin 9, Ireland