Reversible structural switching of a metal–organic framework by photoirradiation

2017 ◽  
Vol 53 (81) ◽  
pp. 11142-11145 ◽  
Author(s):  
Varvara I. Nikolayenko ◽  
Simon A. Herbert ◽  
Leonard J. Barbour
Keyword(s):  
Sorption Capacity ◽  
Pore Volume ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Organic Framework

A photoresponsive metal organic framework material undergoes switching of its pore volume and sorption capacity.

scholarly journals Hydrogen-Bonding Linkers Yield a Large-Pore, Non-Catenated, Metal-Organic Framework with pcu Topology

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 697 ◽  
Author(s):  
Mohammad S. Yazdanparast ◽  
Victor W. Day ◽  
Tendai Gadzikwa
Keyword(s):  
Hydrogen Bonding ◽  
Pore Volume ◽  
Reliable Method ◽  
Metal Organic Framework ◽  
Low Density ◽  
Paddle Wheel ◽  
Accessible Volume ◽  
New Material ◽  
Metal Organic ◽  
Organic Framework

Pillared paddle-wheel-based metal-organic framework (MOF) materials are an attractive target as they offer a reliable method for constructing well-defined, multifunctional materials. A drawback of these materials, which has limited their application, is their tendency to form catenated frameworks with little accessible volume. To eliminate this disadvantage, it is necessary to investigate strategies for constructing non-catenated pillared paddle-wheel MOFs. Hydrogen-bonding substituents on linkers have been postulated to prevent catenation in certain frameworks and, in this work, we present a new MOF to further bolster this theory. Using 2,2′-diamino-[1,1′-biphenyl]-4,4′-dicarboxylic acid, BPDC-(NH2)2, linkers and dipyridyl glycol, DPG, pillars, we assembled a MOF with pcu topology. The new material is non-catenated, exhibiting large accessible pores and low density. To the best of our knowledge, this material constitutes the pcu framework with the largest pore volume and lowest density. We attribute the lack of catenation to the presence of H-bonding substituents on both linkers.

An anionic metal–organic framework with ternary building units for rapid and selective adsorption of dyes

2017 ◽  
Vol 46 (10) ◽  
pp. 3332-3337 ◽  
Author(s):  
Shuo Yao ◽  
Tong Xu ◽  
Nian Zhao ◽  
Lirong Zhang ◽  
Qisheng Huo ◽  
...  
Keyword(s):  
Pore Volume ◽  
Organic Dyes ◽  
Selective Adsorption ◽  
Metal Organic Framework ◽  
Donor Ligand ◽  
Large Pore ◽  
Metal Organic ◽  
Cluster A ◽  
Large Pore Volume ◽  
Organic Framework

JLU-Liu39with ternary building units including a rare hexa-nuclear [Cu6O2(SO4)6] cluster, a classical paddlewheel and a hetero-N, O donor ligand was synthesized. Owing to the ionic framework and large pore volume,JLU-Liu39shows rapid and selective adsorption of organic dyes.

scholarly journals Metal–organic framework sorbents for the removal of perfluorinated compounds in an aqueous environment

2018 ◽  
Vol 42 (22) ◽  
pp. 17889-17894 ◽  
Author(s):  
Karima Sini ◽  
Damien Bourgeois ◽  
Madjid Idouhar ◽  
Michaël Carboni ◽  
Daniel Meyer
Keyword(s):  
Sorption Capacity ◽  
Metal Organic Framework ◽  
Perfluorinated Compounds ◽  
Aqueous Environment ◽  
Metal Organic ◽  
Organic Framework

A hydrophobic metal–organic framework has revealed high and fast sorption capacity for fluorine pollutants.

Photoresponsive spiropyran-functionalised MOF-808: postsynthetic incorporation and light dependent gas adsorption properties

2016 ◽  
Vol 4 (28) ◽  
pp. 10816-10819 ◽  
Author(s):  
Katherine Healey ◽  
Weibin Liang ◽  
Peter D. Southon ◽  
Tamara L. Church ◽  
Deanna M. D'Alessandro
Keyword(s):  
Surface Area ◽  
Pore Volume ◽  
Gas Adsorption ◽  
Metal Organic Framework ◽  
Adsorption Properties ◽  
Metal Organic ◽  
Post Synthesis ◽  
Organic Framework

The first example of spiropyran (SP) functionalised metal–organic framework (MOF) was synthesised via a two-step post-synthesis modification of the Zr-oxo nodes in MOF-808. The resulting MOF-808-SP showed photoresponsive surface area, pore volume and CO2 uptake.

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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