Metal-organic framework glasses with permanent accessible porosity

Zhou, Chao; Longley, Louis; Krajnc, Andraž; Smales, Glen J.; Qiao, Ang; Eruçar, İlknur; Doherty, Cara M.; Thornton, Aaron W.; Hill, Anita J.; Ashling, Christopher W.; Qazvini, Omid T.; Lee, Seok J.; Chater, Philip A.; Terrill, Nicholas J.; Smith, Andrew J.; Yue, Yuanzheng; Mali, Gregor; Keen, David A.; Telfer, Shane G.; Bennett, Thomas D.

doi:10.1038/s41467-018-07532-z

Cited by 180 publications

(140 citation statements)

References 50 publications

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“…In previous work 38 , we have used spin-diffusion NMR spectroscopy in order to investigate the distribution of organic components within mixed-linker MOF systems. This technique makes use of the differential rates of proton polarisation transfer between species on the same, or separate, organic linkers (Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Metal-organic framework crystal-glass composites

et al. 2019

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The majority of research into metal-organic frameworks (MOFs) focuses on their crystalline nature. Recent research has revealed solid-liquid transitions within the family, which we use here to create a class of functional, stable and porous composite materials. Described herein is the design, synthesis, and characterisation of MOF crystal-glass composites, formed by dispersing crystalline MOFs within a MOF-glass matrix. The coordinative bonding and chemical structure of a MIL-53 crystalline phase are preserved within the ZIF-62 glass matrix. Whilst separated phases, the interfacial interactions between the closely contacted microdomains improve the mechanical properties of the composite glass. More significantly, the high temperature open pore phase of MIL-53, which spontaneously transforms to a narrow pore upon cooling in the presence of water, is stabilised at room temperature in the crystal-glass composite. This leads to a significant improvement of CO 2 adsorption capacity.

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Section: Resultsmentioning

confidence: 99%

Metal-organic framework crystal-glass composites

et al. 2019

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“…As discussed in the preceding sections, a key barrier to the implementation of MOFs in industry is their lack of processability owing to their general insolubility and inherently powdered form. While a variety of methods have been attempted to transform MOF powders into appropriate monolithic forms, such as pressing powders into pellets [124], melting them to form glasses [125][126][127], or forming MOF coatings on monolithic supports (such as those mentioned in Sect. 2.1) [128], typically such techniques result in reduced MOF surface area.…”

Section: D Printing Methodsmentioning

confidence: 99%

Hierarchical Metal–Organic Frameworks with Macroporosity: Synthesis, Achievements, and Challenges

et al. 2019

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HIGHLIGHTS• The advantages of macroporous metal-organic frameworks (MOFs) in comparison with micro-and mesoporous MOFs are discussed.• A range of synthetic methods for the fabrication and characterisation of hierarchical MOFs with macroporosity are reviewed.• The applications, advancements, and challenges of each method are compared and assessed in detail.ABSTRACT Introduction of multiple pore size regimes into metalorganic frameworks (MOFs) to form hierarchical porous structures can lead to improved performance of the material in various applications.In many cases, where interactions with bulky molecules are involved, enlarging the pore size of typically microporous MOF adsorbents or MOF catalysts is crucial for enhancing both mass transfer and molecular accessibility. In this review, we examine the range of synthetic strategies which have been reported thus far to prepare hierarchical MOFs or MOF composites with added macroporosity. These fabrication techniques can be either pre-or post-synthetic and include using hard or soft structural template agents, defect formation, routes involving supercritical CO 2 , and 3D printing. We also discuss potential applications and some of the challenges involved with current techniques, which must be addressed if any of these approaches are to be taken forward for industrial applications.

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“…13,19,42−46 Recently, such glasses were successfully made from several zeolitic imidazolate frameworks (ZIFs). 9−12…”

Section: Introductionmentioning

confidence: 99%

Broad Mid-Infrared Luminescence in a Metal–Organic Framework Glass

et al. 2019

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Metal–organic framework (MOF) glasses are a newly discovered family of melt-quenched glasses. Despite considerable progress in understanding the nature of MOF glasses, their photonic functionalities have not been found so far. Here, we report on the first breakthrough regarding the photonic functionalities of MOF glasses, that is, finding of the luminescence in melt-quenched MOF glasses. The finding was achieved on a zeolitic imidazolate framework (ZIF) series, that is, the ZIF-62 series: Zn 1– x Co x (Im) 1.7 (bIm) 0.3 , x = 0, 0.1, and 0.5, where Co substitutes Zn in ZIF-62 forming single-phased solid solutions. Remarkably, we observed broadband mid-infrared (Mid-IR) luminescence (in the wavelength range of 1.5–4.8 μm) in both the crystalline and amorphous solid solutions. The intensity of the luminescence in ZIF glass is gradually enhanced by increasing the level of Co concentration. The observed Mid-IR emission originates from d–d transition of Co ions. The discovery of the luminescence in ZIF-62 glass may pave the way toward new photonic applications of bulk MOF glasses.

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Metal-organic framework glasses with permanent accessible porosity

Cited by 180 publications

References 50 publications

Metal-organic framework crystal-glass composites

Metal-organic framework crystal-glass composites

Hierarchical Metal–Organic Frameworks with Macroporosity: Synthesis, Achievements, and Challenges

Broad Mid-Infrared Luminescence in a Metal–Organic Framework Glass

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