1. Max-Planck-Institut für Bioanorganische Chemie, Stiftstraße
34-36, D-45470 Mülheim an der Ruhr, Germany
2. Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta Georgia
30322, United States
3. EPSRC
National UK EPR Facility
and Service, Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
4. School of Chemistry and Physics, The University of Adelaide, SA 5005, Australia