A metal-organic framework with ultrahigh glass-forming ability

Qiao, Ang; Bennett, Thomas D.; Tao, Haizheng; Krajnc, Andraž; Mali, Gregor; Doherty, Cara M.; Thornton, Aaron W.; Mauro, John C.; Greaves, G.N.; Yue, Yuanzheng

doi:10.1126/sciadv.aao6827

Cited by 266 publications

(392 citation statements)

References 42 publications

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“…200–300 °C corresponded to the solvent release. The ZIF‐62 crystals melted at 434 °C, consistent with prior observations . The melting temperature ( T m ) of ZIF‐62 crystals can be engineered by adjusting the molar ratio of Im to Bim .…”

Section: Figuresupporting

confidence: 83%

A MOF Glass Membrane for Gas Separation

et al. 2020

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Metal–organic framework (MOF) glasses are promising candidates for membrane fabrication due to their significant porosity, the ease of processing, and most notably, the potential to eliminate the grain boundary that is unavoidable for polycrystalline MOF membranes. Herein, we developed a ZIF‐62 MOF glass membrane and exploited its intrinsic gas‐separation properties. The MOF glass membrane was fabricated by melt‐quenching treatment of an in situ solvothermally synthesized polycrystalline ZIF‐62 MOF membrane on a porous ceramic alumina support. The molten ZIF‐62 phase penetrated into the nanopores of the support and eliminated the formation of intercrystalline defects in the resultant glass membrane. The molecular sieving ability of the MOF membrane is remarkably enhanced via vitrification. The separation factors of the MOF glass membrane for H2/CH4, CO2/N2 and CO2/CH4 mixtures are 50.7, 34.5, and 36.6, respectively, far exceeding the Robeson upper bounds.

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Section: Figuresupporting

confidence: 83%

A MOF Glass Membrane for Gas Separation

et al. 2020

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“…The further exploration discovers that the glass-forming ability (GFA) could be tuned by adjusting the chemistry of the initial structure. 17 ZIF-62 is the typical material which composes two different organic ligands and owns the ultra-high glass forming ability.…”

Section: Introductionmentioning

confidence: 99%

Unraveling the effects of linker substitution on structural, electronic and optical properties of amorphous zeolitic imidazolate frameworks-62 (a-ZIF-62) glasses: a DFT study

et al. 2020

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“…Recently, non‐crystalline ZIFs have become of interest . These structures are synthesized via different pathways, including melt‐quenching, high‐temperature solid‐solid transitions, high‐pressure amorphization, and ball milling . Pair distribution function (PDF) studies have revealed their structures to be continuous random networks of corner sharing Zn(Im) 4 tetrahedra, analogous to models of aSiO 2 …”

Section: Introductionmentioning

confidence: 99%

Structural, electronic, and dielectric properties of a large random network model of amorphous zeolitic imidazolate frameworks and its analogues

Wang

et al. 2019

J Am Ceram Soc

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The amorphous zeolitic imidazolate frameworks (a-ZIFs) models and its analogues (with 918 or 810 atoms, respectively) are constructed based on a larger continuous random network (CRN) model of amorphous SiO 2 (a-SiO 2 ) model.The atomic, electronic, and dielectric properties of these structures, which possess different metal nodes and organic linkers, are investigated by well-defined density functional theory (DFT) calculations. The results suggest that all a-ZIFs have ultra-low dielectric constants and a large energy loss function (ELF), which suggests that they may be good candidates for electromagnetic absorptive materials.Most important, these a-ZIFs models offer a base-line model for other amorphous ZIFs for further research on models containing vacancies, defects, doping or under high pressure or high temperature. K E Y W O R D Samorphous, density functional theory, dielectric properties, electronic properties, zeolitic imidazolate frameworks

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A metal-organic framework with ultrahigh glass-forming ability

Abstract: We have discovered and clarified the ultrahigh glass-forming ability of the metal-organic frameworks—ZIF-62 [Zn(Im2−xbImx)].

Cited by 266 publications

References 42 publications

A MOF Glass Membrane for Gas Separation

A MOF Glass Membrane for Gas Separation

Unraveling the effects of linker substitution on structural, electronic and optical properties of amorphous zeolitic imidazolate frameworks-62 (a-ZIF-62) glasses: a DFT study

Structural, electronic, and dielectric properties of a large random network model of amorphous zeolitic imidazolate frameworks and its analogues

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