Metalorganic frameworks based on the 1,4-bis(5-tetrazolyl) benzene ligand: The Ag and Cu derivatives
| Autor: | Angelo Maspero, Giulia Peli, Valentina Colombo, Stefano Stagni, Norberto Masciocchi, Simona Galli, Jorge A. R. Navarro, Elisa Barea |
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| Přispěvatelé: | Maspero A., Galli S., Colombo V., Peli G., Masciocchi N., Stagni S., Barea E., Navarro J.A.G. |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Pyrazine
Chemistry Ligand METAL ORGANIC FRAMEWORKS Inorganic Chemistry TETRAZOLATES chemistry.chemical_compound Crystallography Metal organic frameworks nitrogen ligands X-ray powder diffraction tetrazolate Adsorption tetrazolate Materials Chemistry Metal-organic framework Reactivity (chemistry) Physical and Theoretical Chemistry Triphenylphosphine Benzene X-RAY POWDER DIFFRACTION NITROGEN LIGANDS Powder diffraction |
| Popis: | The recently proposed high-yield synthesis of the 1,4-bis(5-tetrazolyl)benzene ligand (H2btb) allowed the preparation of three new metal organic frameworks, namely Ag2(btb), 1, Cu2(btb), 2, and Cu2(OH)2(btb), 3. These polycrystalline materials were fully characterised by spectroscopic, gas adsorption, thermal and diffraction methods, the latter revealing rather dense frameworks for 1 and 3. Despite many different synthetic approaches, 2 invariably gave a poorly resolved, but highly reproducible, powder diffraction trace, hampering a complete structural characterisation. Magnetic measurements performed on 3 showed that it behaves as an antiferromagnetic material, the r.t. magnetic moment per Cu atom being only 1.24μB. The reactivity of 1 was proved in excess of triphenylphosphine (PPh3), allowing the isolation of the dinuclear species 4, [(PPh3)3Ag]2(btb). An additional species 5, formulated as [(PPh3)Ag]2(btb), could be selectively isolated on varying the reaction conditions; at variance, pyrazine, in solution or in molten form, did not react with 1. |
| Databáze: | OpenAIRE |
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