1. Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
2. Department of Chemistry, Supramolecular Organic and Organometallic Chemistry Centre (SOOMCC) Faculty of Chemistry and Chemical Engineering Babeş-Bolyai University Arany János Steet 11 400028 Cluj-Napoca Romania
3. Institute of Chemistry St. Petersburg State University Universitetskaya emb. 7/9 199034 St. Petersburg Russia