1. Laboratory of Radiochemistry , Institute of Natural Sciences of Perm State University , 4, Genkel St. , Perm 614990 , Russia
2. Chemistry Department , Saint-Petersburg State University , 7/9, Universitetskaya nab. , Saint-Petersburg 199034 , Russia
3. Chemistry Department , M.V. Lomonosov Moscow State University , 1, Leninskie Gory , Moscow 119991 , Russia
4. Chemistry Department , Perm State University , 15, Bukirev St. , Perm 614990 , Russia
5. Department of Radiology , Vanderbilt University Institute of Imaging Science (VUIIS) , Nashville, TN 37232 , USA
6. Department of Chemistry and Applied Biological Sciences , South Dakota School of Mines and Technology , Rapid City, SD 57701 , USA