1. Department of Chemistry and Materials Chemistry Centre, Christopher Ingold Laboratory, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
2. Laboratoire de Physico-Chimie des Matériaux Luminescents, Université Claude Bernard Lyon 1, UMR 5620 CNRS, Université de Lyon, 12 rue Ada Byron, 69622 Villeurbanne cedex, France
3. European Synchrotron Radiation Facility, BP 220, F-38043, Grenoble, France
4. Department of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ