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Water stabilization of Zr₆-based metal-organic frameworks via solvent-assisted ligand incorporation.

ABSTRACT: Water stability in metal-organic frameworks (MOFs) is critical for several practical applications. While water instability is mainly thought to stem from linker hydrolysis, MOFs with strong, hydrolysis-resistant metal-linker bonds can be susceptible to damage by capillary forces, which cause cavities and channels to collapse during activation from water. This study utilizes metal node functionalization as a strategy to create vapor-stable and recyclable MOFs.

SUBMITTER: Deria P

PROVIDER: S-EPMC6088556 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature

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Water stabilization of Zr<sub>6</sub>-based metal-organic frameworks <i>via</i> solvent-assisted ligand incorporation.

Deria Pravas P Chung Yongchul G YG Snurr Randall Q RQ Hupp Joseph T JT Farha Omar K OK

Chemical science 20150701 9

Water stability in metal-organic frameworks (MOFs) is critical for several practical applications. While water instability is mainly thought to stem from linker hydrolysis, MOFs with strong, hydrolysis-resistant metal-linker bonds can be susceptible to damage by capillary forces, which cause cavities and channels to collapse during activation from water. This study utilizes metal node functionalization as a strategy to create vapor-stable and recyclable MOFs. ...[more]

PMID: 30155009

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Project description:As the world population continues to grow, there is also a rising concern regarding water pollution since this condition could negatively impact the supply of clean water. One of the most recent concerns is related to the pollution that comes from various pharmaceuticals, in particular non-steroidal anti-inflammatory drugs (NSAIDs) since they have been industrially produced at large scale and can be easily purchased as an over-the-counter medicine. Diclofenac is one of the most popular NSAIDs because of its high-effectiveness, which leads to its excessive consumption. Consequently, its presence in water bodies is also continuously increasing. An adsorption process could then be employed as a highly effective method to address this issue. In comparison to other conventional adsorbents such as activated carbon, the use of metal-organic frameworks (MOFs) as an alternative adsorbent is very attractive since it can offer various advantages such as tailorability and high adsorption capacity. In this study, the performance of three water-stable, free-base porphyrin MOFs assembled using zirconia-based nodes, namely MOF-525, MOF-545, and NU-902, for diclofenac adsorption was thoroughly investigated. Interestingly, although all three free-base porphyrin MOFs are assembled using the same building block and have a similar specific surface area (based on the experimental argon physisorption and calculation based on non-localized density functional theory), their diclofenac adsorption capacity is substantially different from one another. It is found that the highest diclofenac adsorption capacity is shown by MOF-525, which has maximum capacity around 792 mg g-1. This is then followed by MOF-545 and NU-902 that have adsorption capacities around 591 and 486 mg g-1, respectively. Some possible adsorption mechanisms are then thoroughly discussed that might contribute to this phenomenon. Lastly, their performance is also compared with other MOFs that are also studied for this purpose to show their performance superiority not only in terms of adsorption capacity but also their affinity towards the diclofenac molecule, which might be useful as an adsorption performance indicator in the real condition where the contaminant concentration is considerably low.

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Water stabilization of Zr₆-based metal-organic frameworks via solvent-assisted ligand incorporation.

Publications

Water stabilization of Zr<sub>6</sub>-based metal-organic frameworks <i>via</i> solvent-assisted ligand incorporation.

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Water stabilization of Zr6-based metal-organic frameworks via solvent-assisted ligand incorporation.

Publications

Water stabilization of Zr<sub>6</sub>-based metal-organic frameworks <i>via</i> solvent-assisted ligand incorporation.

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OmicsDI is part of the ELIXIR infrastructure

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Water stabilization of Zr₆-based metal-organic frameworks via solvent-assisted ligand incorporation.