Mediating Order and Modulating Porosity by Controlled Hydrolysis in a Phosphonate Monoester Metal-Organic Framework
| Autor: | Racheal P. S. Huynh, Benjamin S. Gelfand, George K. H. Shimizu, Roger K. Mah |
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| Rok vydání: | 2016 |
| Předmět: |
Chemistry
010405 organic chemistry Inorganic chemistry chemistry.chemical_element Sorption 02 engineering and technology General Chemistry General Medicine 021001 nanoscience & nanotechnology 010402 general chemistry Copper Phosphonate 01 natural sciences Catalysis 0104 chemical sciences Hydrolysis chemistry.chemical_compound Adsorption Metal-organic framework 0210 nano-technology Porosity Selectivity |
| Zdroj: | Angewandte Chemie. 128:14834-14837 |
| ISSN: | 0044-8249 |
| DOI: | 10.1002/ange.201607745 |
| Popis: | A crystalline and permanently porous copper phosphonate monoester framework has been synthesized from a tetraaryl trigonal phosphonate monoester linker. This material has a surface area over 1000 m2 g−1, as measured by N2 sorption, the highest reported for a phosphonate-based metal–organic framework (MOF). The monoesters result in hydrophobic pore surfaces that give a low heat of adsorption for CO2 and low calculated selectivity for CO2 over N2 and CH4 in binary mixtures. By careful manipulation of synthetic conditions, it is possible to selectively remove some of the monoesters lining the pore to form a hydrogen phosphonate while giving an isomorphous structure. This increases the affinity of the framework for CO2 giving higher ambient uptake, higher heat of adsorption, and much higher calculated selectivity for CO2 over both N2 and CH4. Formation of the acid groups is noteworthy as complexation with the parent acid gives a different structure. |
| Databáze: | OpenAIRE |
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