1. National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat Street, 400293 Cluj-Napoca, Romania
2. Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01056 Dresden, Germany
3. Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany