1. Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW (UK) http://www.ch.cam.ac.uk/person/cpg27
2. School of Chemistry, University of St Andrews, The Purdie Building, North Haugh, St Andrews KY16 9ST (UK)
3. Current address: Stephenson Institute for Renewable Energy, Department of Chemistry, University of Liverpool (UK)
4. Department of Chemistry, McMaster University, 1280 Main Street West, Hamilton, Ontario, L8S 4M1 (Canada)
5. Department of Chemistry, SUNY Stony Brook, Stony Brook, NY 11794 (USA)