1. Inorganic Chemistry and Centre for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstrasse 5-7, 45117 Essen, Germany
2. Charles A. Goessmann Professor of Chemistry and University Distinguished Professor, Department of Chemistry, University of Massachusetts Amherst, Amherst, Massachusetts 01002, United States
3. UCD School of Chemistry, Science Centre South, University College Dublin, Belfield, Dublin 4, Ireland