1. CQE − Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
2. CICECO − Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
3. Institut fuer Anorganische und Analytische Chemie, J. W. Goethe Universitaet, Frankfurt am Main, Frankfurt am Main, Germany