1. Faculty of Chemistry, University of Bucharest, 90 Panduri, 050663 Bucharest, Romania
2. ‘C. D. Nenitzescu’ Institute of Organic and Supramolecular Chemistry of the Romanian Academy, 202B Spl. Independentei, 060023 Bucharest, Romania
3. Institute of Physical Chemistry, 202 Spl. Independentei, 060021 Bucharest, Romania
4. Faculty of Biology, University of Bucharest, 91-95 Spl. Independentei, 050095 Bucharest, Romania