A Hexameric Cationic Copper(II) Metallacrown as a Pertechnetate and Perrhenate Scavenger |
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| Authors: | Dr Sabina Rodríguez‐Hermida Dr Ana Belén Lago Arantxa Pino‐Cuevas Dr Adelheid Hagenbach Dr Laura Cañadillas‐Delgado Prof Rosa Carballo Prof Ulrich Abram Prof Ezequiel M Vázquez‐López |
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| Affiliation: | 1. Departamento de Química Inorgánica, Facultade de Química, Instituto de Investigación Biomédica - Universidade, Vigo, Galicia, Spain;2. Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Barcelona, Spain;3. Institut für Chemie und Biochemie, Freie Universit?t Berlin, Berlin, Germany;4. Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Zaragoza, Spain |
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| Abstract: | Materials based on the cationic copper(II) hexanuclear 18‐membered metallacrown 18‐MC ‐6]6+ (2phH=2‐piconyl hydrazide) and tetrafluoroborate, perchlorate, nitrate, sulfate, and perrhenate anions were prepared by an easy method in aqueous medium. Single‐crystal X‐ray characterization of six members of this new family of complexes showed that the anions are attached to the metallacrown by direct coordination to a copper cation or by hydrogen‐bonding interaction with the center of the hexamer. The stable cationic nature of the complexes and their ability to bind different anions allows them to adsorb and immobilize environmentally relevant anions such as MO4? (M=Tc, Re). The MO4? trapping capacities suggest that these materials would be useful in the treatment of oxoanionic contaminants in water. |
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| Keywords: | copper crown compounds ion exchange rhenium technetium |
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