1. Chair for Theoretical Chemistry and Laboratory of the National Foundation for Cancer Research, Department of Chemistry and Pharmacy, Faculty of Sciences, Friedrich-Alexander-University-Erlangen-Nürnberg; Egerlandstr. 3 91058 Erlangen Germany
2. Department of Molecular and Biomolecular Physics; National Institute for Research and Development of Isotopic and Molecular Technologies; Str. Donath 65-103, C.P. 700 Cluj Napoca RO-400293 Romania