1. Inorganic Spectroscopy Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34–36 45470 Mülheim an der Ruhr Germany
2. Institute for Biochemistry and BIOSS Centre for Biological Signalling Studies Albert Ludwigs University of Freiburg Albertstrasse 21 79104 Freiburg Germany
3. Argonne National Laboratory 9700 S. Cass Ave Argonne IL 60439 USA