1. Department of General and Inorganic Chemistry, University of Pardubice, nám. Čs. legií 565, CZ-532 10, Pardubice, Czech Republic
2. Lehrstuhl für Anorganische Chemie II der Technischen Universität, D-44227 Dortmund, Germany
3. Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Avenida da República, EAN, 2780-157, Oeiras, Portugal
4. Department of Chemistry, University of Aveiro, CICECO, 3810-193 Aveiro, Portugal