Inorganic−Organic Hybrid Materials Containing Porous Frameworks: Synthesis, Characterization, and Magnetic Properties of the Open Framework Solids [{Co(4,4‘-Bipy)}V2O6] and [{Co2(4,4‘-Bipy)3(H2O)2}V4O12]·2H2O
| Autor: | Elizabeth Yohannes, M. Ishaque Khan, Vladimir O. Golub, ‡ and Charles J. O'Connor, Renata C. Nome, Samar Ayesh, Robert J. Doedens |
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| Rok vydání: | 2004 |
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| Zdroj: | Chemistry of Materials. 16:5273-5279 |
| ISSN: | 1520-5002 0897-4756 |
| DOI: | 10.1021/cm049071d |
| Popis: | Synthesis of two novel porous framework hybrid materials, [Co(4,4‘-bipy)V2O6] (1) and [{Co2(4,4‘-bipy)3(H2O)2}V4O12]·2H2O (2), and their characterization by infrared spectroscopy, thermogravimetry, elemental analysis, manganometric titration, surface area measurement, bond valence sum calculations, temperature-dependent magnetic susceptibility measurement, and single-crystal X-ray structure analyses is described. Both compounds exhibit remarkable thermal stability. The three-dimensional structures of 1 and 2 are composed of fused {VO4} motifs linked by {Co(4,4‘-bipy)} coordination polymers. The structure of 1 is comprised of {CoO3N2} trigonal bipyramids, linked in two dimensions by corner-sharing {VO4} tetrahedra and in the third dimension by the 4,4‘-bipyridine ligands. In the bimetallic layers, the cobalt centers are bridged alternately by {VO4} and {V2O7} units, generating alternating eight-membered {Co2V2O4} and twelve-membered {Co2V4O6} rings. The crystal structure of 2 consists of a novel three-dime... |
| Databáze: | OpenAIRE |
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