Mechanical Properties of a Metal–Organic Framework formed by Covalent Cross-Linking of Metal–Organic Polyhedra
| Autor: | Garima Lal, Denis M. Spasyuk, Jian-Bin Lin, Milana Trifkovic, Maziar Derakhshandeh, Farid Akhtar, George K. H. Shimizu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Alkene Composite number General Chemistry Polymer 010402 general chemistry 01 natural sciences Biochemistry Catalysis 0104 chemical sciences Metal Colloid and Surface Chemistry Chemical engineering chemistry Covalent bond visual_art visual_art.visual_art_medium Selectivity Alkyl |
| Zdroj: | Journal of the American Chemical Society. 141:1045-1053 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/jacs.8b11527 |
| Popis: | Overcoming the brittleness of metal–organic frameworks (MOFs) is a challenge for industrial applications. To increase the mechanical strength, MOFs have been blended with polymers to form composites. However, this also brings challenges, such as integration and integrity of MOF in the composite, which can hamper the selectivity of gas separations. In this report, an “all MOF” material with mechanical flexibility has been prepared by covalent cross-linking of metal–organic polyhedra (MOPs). The ubiquitous Cu24 isophthalate MOP has been decorated with a long alkyl chain having terminal alkene functionalities so that MOPs can be cross-linked via olefin metathesis using Grubbs second generation catalyst. Different degrees of cross-linked MOP materials have been obtained by varying the amount of catalyst in the reaction. Rheology of these structures with varying number of cross-links was performed to assess the cross-link density and its homogeneity throughout the sample. The mechanical properties were further... |
| Databáze: | OpenAIRE |
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