1. Faculty of Chemistry, Biology, Geography, West University of Timisoara, 4 Bv. Vasile Parvan, 300223 Timisoara, Romania
2. Institute of Chemistry Timisoara of the Romanian Academy, 24 Mihai Viteazul Bvd., 300223 Timisoara, Romania
3. Institute of Chemical Research of Catalonia, 16 Av. Paisos Catalans, 43007 Tarragona, Spain