1. Department of Chemistry and Pharmacy, Physical Chemistry I and ICMM, Friedrich-Alexander University of Erlangen, Egerlandstr. 3, D-91058 Erlangen, Germany
2. Department of Chemistry and Pharmacy, Inorganic and General Chemistry, Friedrich-Alexander University of Erlangen, Egerlandstr. 1, D-91058 Erlangen, Germany
3. Department of Radiation Oncology, Friedrich-Alexander University of Erlangen, Universitätsstr. 27, D-91054 Erlangen, Germany
4. Department of Physics, Institute of Crystallography and Structural Physics, Friedrich-Alexander University of Erlangen, Staudtstr. 3, D-91058 Erlangen, Germany