scholarly journals Post-synthetic pore-space expansion in a di-tagged metal–organic framework

CrystEngComm ◽  
2014 ◽  
Vol 16 (39) ◽  
pp. 9158-9162 ◽  
Author(s):  
Lodey Tshering ◽  
Sally O. Hunter ◽  
Alexandra Nikolich ◽  
Erica Minato ◽  
Christopher M. Fitchett ◽  
...  
Keyword(s):  
Pore Space ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Space Expansion ◽  
Organic Framework

scholarly journals High temperature expulsion of thermolabile groups for pore-space expansion in metal–organic frameworks

CrystEngComm ◽  
2019 ◽  
Vol 21 (1) ◽  
pp. 60-64 ◽  
Author(s):  
Macguire R. Bryant ◽  
Timothy A. Ablott ◽  
Shane G. Telfer ◽  
Lujia Liu ◽  
Christopher Richardson
Keyword(s):  
High Temperature ◽  
Pore Space ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Radiative Heating ◽  
Metal Organic ◽  
Space Expansion ◽  
Organic Framework

Direct radiative heating at 200 °C quantitatively converts sulfoxide-tags to desirable vinyl groups on a porous zinc(ii) metal–organic framework analogue of IRMOF-9.

scholarly journals Bimetallic AgPd/UiO-66 Hybrid Catalysts for Propylene Glycol Oxidation into Lactic Acid

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5471
Author(s):  
Sergey Ten ◽  
Viktoriia V. Torbina ◽  
Vladimir I. Zaikovskii ◽  
Sergei A. Kulinich ◽  
Olga Vodyankina
Keyword(s):  
Lactic Acid ◽  
Propylene Glycol ◽  
External Surface ◽  
Pore Space ◽  
Metal Organic Framework ◽  
Acetonitrile Solution ◽  
Transition Electron Microscopy ◽  
Metal Organic ◽  
Temperature Programmed ◽  
Organic Framework

Different methods (the wetness impregnation of Ag and Pd precursors dissolved in water or acetonitrile solution, and the double solvent impregnation technique) were employed to immobilize Ag–Pd nanoparticles (NPs) into the pores of the microporous zirconium-based metal-organic framework known as UiO-66. The obtained materials were characterized by using nitrogen adsorption-desorption at −196 °C, powder X-ray diffraction, UV-Vis diffusion reflectance spectroscopy, and transition electron microscopy measurements. Special attention was paid to the acid and redox properties of the obtained materials, which were studied by using temperature-programmed desorption of ammonia (TPD-NH3) and temperature-programmed reduction (TPR-H2) methods. The use of a drying procedure prior to reduction was found to result in metallic NPs which, most likely, formed on the external surface and were larger than corresponding voids of the metal-organic framework. The formation of Ag–Pd alloy or monometallic Ag and Pd depended on the nature of both metal precursors and the impregnation solvent used. Catalytic activity of the AgPd/UiO-66 materials in propylene glycol oxidation was found to be a result of synergistic interaction between the components in AgPd alloyed NPs immobilized in the pore space and on the external surface of UiO-66. The key factor for consistent transformation of propylene glycol into lactic acid was the proximity between redox and acid-base species.

Pore Space Partition within a Metal–Organic Framework for Highly Efficient C2H2/CO2 Separation

2019 ◽  
Vol 141 (9) ◽  
pp. 4130-4136 ◽  
Author(s):  
Yingxiang Ye ◽  
Zhenlin Ma ◽  
Rui-Biao Lin ◽  
Rajamani Krishna ◽  
Wei Zhou ◽  
...  
Keyword(s):  
Pore Space ◽  
Metal Organic Framework ◽  
Co2 Separation ◽  
Space Partition ◽  
Highly Efficient ◽  
Metal Organic ◽  
Organic Framework

Optimizing Pore Space for Flexible-Robust Metal–Organic Framework to Boost Trace Acetylene Removal

2020 ◽  
Author(s):  
Jun Wang ◽  
Yan Zhang ◽  
Peixin Zhang ◽  
Jianbo Hu ◽  
Rui-Biao Lin ◽  
...  
Keyword(s):  
Pore Space ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Organic Framework

Pore Space Partitioning of Metal–Organic Framework for C2Hx Separation from Methane

2019 ◽  
Vol 58 (9) ◽  
pp. 5410-5413 ◽  
Author(s):  
Jia Li ◽  
Sheng Chen ◽  
Lianyan Jiang ◽  
Dapeng Wu ◽  
Yanshuo Li
Keyword(s):  
Pore Space ◽  
Metal Organic Framework ◽  
Space Partitioning ◽  
Metal Organic ◽  
Organic Framework

Pillar-Layered Metal–Organic Framework with Sieving Effect and Pore Space Partition for Effective Separation of Mixed Gas C2H2/C2H4

2017 ◽  
Vol 9 (34) ◽  
pp. 29374-29379 ◽  
Author(s):  
Xu-Jia Hong ◽  
Qin Wei ◽  
Yue-Peng Cai ◽  
Bing-bing Wu ◽  
Hai-Xing Feng ◽  
...  
Keyword(s):  
Pore Space ◽  
Metal Organic Framework ◽  
Mixed Gas ◽  
Space Partition ◽  
Effective Separation ◽  
Metal Organic ◽  
Sieving Effect ◽  
Organic Framework

Multifunctional metal–organic framework heterostructures for enhanced cancer therapy

2021 ◽  
Author(s):  
Jintong Liu ◽  
Jing Huang ◽  
Lei Zhang ◽  
Jianping Lei
Keyword(s):  
Cancer Therapy ◽  
General Principle ◽  
Biomedical Applications ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Functional Modulation ◽  
Organic Framework

We review the general principle of the design and functional modulation of nanoscaled MOF heterostructures, and biomedical applications in enhanced therapy.

Magnetic Ordering via Itinerant Ferromagnetism in a Metal-Organic Framework

2020 ◽  
Author(s):  
Jesse Park ◽  
Brianna Collins ◽  
Lucy Darago ◽  
Tomce Runcevski ◽  
Michael Aubrey ◽  
...  
Keyword(s):  
Charge Transport ◽  
Magnetic Order ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Magnetic Ordering ◽  
Double Exchange ◽  
Itinerant Ferromagnetism ◽  
Organic Solids ◽  
Metal Organic ◽  
Organic Framework

<b>Materials that combine magnetic order with other desirable physical attributes offer to revolutionize our energy landscape. Indeed, such materials could find transformative applications in spintronics, quantum sensing, low-density magnets, and gas separations. As a result, efforts to design multifunctional magnetic materials have recently moved beyond traditional solid-state materials to metal–organic solids. Among these, metal–organic frameworks in particular bear structures that offer intrinsic porosity, vast chemical and structural programmability, and tunability of electronic properties. Nevertheless, magnetic order within metal–organic frameworks has generally been limited to low temperatures, owing largely to challenges in creating strong magnetic exchange in extended metal–organic solids. Here, we employ the phenomenon of itinerant ferromagnetism to realize magnetic ordering at <i>T</i><sub>C</sub> = 225 K in a mixed-valence chromium(II/III) triazolate compound, representing the highest ferromagnetic ordering temperature yet observed in a metal–organic framework. The itinerant ferromagnetism is shown to proceed via a double-exchange mechanism, the first such observation in any metal–organic material. Critically, this mechanism results in variable-temperature conductivity with barrierless charge transport below <i>T</i><sub>C</sub> and a large negative magnetoresistance of 23% at 5 K. These observations suggest applications for double-exchange-based coordination solids in the emergent fields of magnetoelectrics and spintronics. Taken together, the insights gleaned from these results are expected to provide a blueprint for the design and synthesis of porous materials with synergistic high-temperature magnetic and charge transport properties. </b>

Solvent-Free Powder Synthesis and MOF-CVD Thin Films of the Mesoporous Metal-Organic Framework MAF-6

2019 ◽  
Author(s):  
Timothée Stassin ◽  
Ivo Stassen ◽  
Joao Marreiros ◽  
Alexander John Cruz ◽  
Rhea Verbeke ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Metal Organic Framework ◽  
Chemical Vapor ◽  
Uptake Capacity ◽  
Powder Synthesis ◽  
Crystalline Films ◽  
Metal Organic ◽  
Mesoporous Metal ◽  
First Time ◽  
Organic Framework

A simple solvent- and catalyst-free method is presented for the synthesis of the mesoporous metal-organic framework (MOF) MAF-6 (RHO-Zn(eIm)2) based on the reaction of ZnO with 2-ethylimidazole vapor at temperatures ≤ 100 °C. By translating this method to a chemical vapor deposition (CVD) protocol, mesoporous crystalline films could be deposited for the first time entirely from the vapor phase. A combination of PALS and Kr physisorption measurements confirmed the porosity of these MOF-CVD films and the size of the MAF-6 supercages (diam. ~2 nm), in close agreement with powder data and calculations. MAF-6 powders and films were further characterized by XRD, TGA, SEM, FTIR, PDF and EXAFS. The exceptional uptake capacity of the mesoporous MAF-6 in comparison to the microporous ZIF-8 is demonstrated by vapor-phase loading of a molecule larger than the ZIF-8 windows.

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