Two new porous UiO-66-type zirconium frameworks; open aromatic N-donor sites and their post-synthetic methylation and metallation
| Autor: | Arnold A. Barkhordarian, Cameron J. Kepert |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Pyrazine
Renewable Energy Sustainability and the Environment 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Adsorption chemistry Polymer chemistry Pyridine Organic chemistry General Materials Science Formate Chelation Carboxylate Lewis acids and bases Isostructural 0210 nano-technology |
| Zdroj: | Journal of Materials Chemistry A. 5:5612-5618 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c6ta11005c |
| Popis: | Two new, isostructural UiO-66-type metal–organic frameworks (MOFs), Zr-PyDC (Zr6O4(OH)5(pyridine-2,5-dicarboxylate)4(formate)3(H2O)34) and Zr-PzDC (Zr6O4(OH)4.75(pyrazine-2,5-dicarboxylate)4.5(formate)2.25(H2O)33) have been synthesised via an unusual high acidity route. Despite the chelating capability of the ligands, which incorporate pyridine and pyrazine N-functionalities, these robust MOFs are linked exclusively through carboxylate donors to leave free Lewis base donor sites. Both MOFs show increased heats of adsorption and higher loadings of CO2 and H2 than UiO-66. High-conversion post-synthetic modification of Zr-PyDC and Zr-PzDC yielded charged, N-methylated frameworks with enhanced gas adsorption capacities. Further, the metal binding properties of Zr-PyDC have been probed by post-synthetic metallation with CuII. |
| Databáze: | OpenAIRE |
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