1. Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK
2. Central Laser Facility, Science and Technology Facilities Council, Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell, OX11 0QX, UK
3. Johnson Matthey Technology Centre, Blounts Court, Sonning Common, Reading, RG4 9NH, UK
4. Department of Chemistry, University of Aberdeen, Aberdeen, AB24 3UE, UK
5. ISIS Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Chilton, Oxon, OX11 0QX, UK
6. School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow, G12 8QQ, UK