1. Department of Inorganic and Analytical Chemistry; University of Debrecen; Egyetem tér 1 Debrecen 4032 Hungary
2. Department of Chemistry and Biochemistry; The Ohio State University; 100 West 18th Avenue Columbus OH 43210 USA
3. Institute of Organic Chemistry; and Institute for Biological Interfaces 4-Magnetic Resonance; Karlsruhe Institute of Technology (KIT); Fritz-Haber-Weg 6 76131 Karlsruhe Germany