Investigation of Missing-Cluster Defects in UiO-66 and Ferrocene Deposition into Defect-Induced Cavities
| Autor: | Yuxia Shen, Sean M. McIntyre, Bin Mu, Bohan Shan, Mitchell R. Armstrong |
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| Rok vydání: | 2018 |
| Předmět: |
Work (thermodynamics)
Materials science General Chemical Engineering Rational design 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Characterization (materials science) chemistry.chemical_compound Deprotonation Ferrocene chemistry Chemical physics Reagent Cluster (physics) Deposition (phase transition) 0210 nano-technology |
| Zdroj: | Industrial & Engineering Chemistry Research. 57:14233-14241 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/acs.iecr.8b03516 |
| Popis: | Advancing our understanding of the defect formation mechanism in metal–organic frameworks (MOFs) is critical for the rational design of the material’s structure. In particular, the defects in the UiO-66 framework have been shown to have a significant impact on the framework functionality and stability. However, the effects of synthesis conditions on defect formation are elusive and our understanding of missing-ligand and missing-cluster defects in UiO-66 is far from clear. In this work, we demonstrate that the formation of missing-cluster (MC) defects is due to the large number of partially deprotonated ligands in synthesis solution. The proposed mechanism is verified by a series of syntheses controlling the defect formation. The results show that the quantity of MC defects is sensitive to deprotonation reagents, synthesis temperature, and reactant concentration. The pore size distribution derived from the N2 adsorption isotherm at 77 K allows accurate and convenient characterization of the defects in UiO... |
| Databáze: | OpenAIRE |
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