1. Laboratory of organosilicon compounds and material Grebenshchikov Institute of Silicate Chemistry RAS 199034 nab. Makarova, 2 Saint-Petersburg Russia
2. PET Centre Granov Russian Research Center of Radiology & Surgical Technologies 197758 Leningradskaya str. 70, Pesochny St. Petersburg Russia
3. Institute of Earth Sciences St. Petersburg State University University Emb., 7/9 199034 Saint- Petersburg Russian Federation