scholarly journals Convergent and Divergent Paired Electrodeposition of Metal-Organic Framework Thin Films

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Saber Alizadeh ◽  
Davood Nematollahi
Keyword(s):  
Thin Films ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Heterogeneous Systems ◽  
Electrode Reaction ◽  
Constant Current ◽  
Time Saving ◽  
Metal Organic ◽  
One Step ◽  
Yield Time

Abstract Employing the environmentally friendly methods for synthesis of the metal-organic frameworks (MOFs) is an urgent need and sustainable development in the synthesis of these compounds is essential. In this way, ignoring the counter electrode reaction is a potentially negative point from green chemistry standpoint which increases some issues like energy consumption and reaction time. We wish to introduce the “paired electrodeposition” (PED) technique as a new method for the simultaneous synthesis and deposition of the MOF thin films (MOFTFs). This protocol implements the uniform pattern of two MOFTF modified substrates by “convergent (CPED: Zna/Znc-MOFTFs) and divergent (DPED: Cua/Znc-MOFTFs) paired electrodeposition” via a one-step synthesis. With the rule of thumb, enhanced energy efficiency and atom economy, increasing electrochemical yield, time-saving along with a variety of products are advantages of this technique. Besides, the “Electrode Modification Efficiency” has introduced for the evaluation of functionality and modification efficiency of electrochemical heterogeneous systems, especially MOFTFs. To investigate this concept, we synthesized Zn3(BTC)2 and Cu3(BTC)2 as MOF models under constant current electrolysis in water and at room temperature. This work can make a breakthrough in the green synthesis of metal-organic frameworks.

Metal–organic framework thin films: electrochemical fabrication techniques and corresponding applications & perspectives

2016 ◽  
Vol 4 (32) ◽  
pp. 12356-12369 ◽  
Author(s):  
Wei-Jin Li ◽  
Min Tu ◽  
Rong Cao ◽  
Roland A. Fischer
Keyword(s):  
Thin Films ◽  
Metal Organic Framework ◽  
High Surface ◽  
Metal Organic Frameworks ◽  
Industrial Applications ◽  
Surface Areas ◽  
Metal Organic ◽  
Electrochemical Fabrication ◽  
Organic Framework

Metal–organic frameworks (MOFs) hold tremendous promise for various academic and industrial applications because of their structural merits (e.g., high surface areas, enormous porosity, and regular order).

Magnetic iron/carbon nanorods derived from a metal organic framework as an efficient heterogeneous catalyst for the chemical oxidation process in water

RSC Advances ◽  
2015 ◽  
Vol 5 (63) ◽  
pp. 50790-50800 ◽  
Author(s):  
Kun-Yi Andrew Lin ◽  
Fu-Kong Hsu
Keyword(s):  
Heterogeneous Catalyst ◽  
Hybrid Materials ◽  
Oxidation Process ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Chemical Oxidation ◽  
Metal Organic ◽  
One Step ◽  
Efficient Heterogeneous Catalyst ◽  
Organic Framework

By one-step carbonization, metal organic frameworks (MOFs) can be conveniently turned into hierarchical hybrid materials which exhibit versatile functionalities.

The synergistic effect of heterostructured dissimilar metal–organic framework thin films on adsorption properties

2020 ◽  
Vol 8 (26) ◽  
pp. 12990-12995
Author(s):  
Zheng Wang ◽  
Suttipong Wannapaiboon ◽  
Sebastian Henke ◽  
Michael Paulus ◽  
Katia Rodewald ◽  
...  
Keyword(s):  
Thin Films ◽  
Synergistic Effect ◽  
Storage Capacity ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Adsorption Properties ◽  
Adsorption Ability ◽  
Dissimilar Metal ◽  
Volatile Organic ◽  
Metal Organic

Two dissimilar metal–organic frameworks are synthesized as heterostructured thin films that show higher storage capacity than both homo-phases and present up-growing adsorption ability with increasing the size of volatile organic compounds.

Remediation of Water and Wastewater Using Metal Organic Framework based Membranes

2021 ◽  
pp. 112-138
Author(s):  
Anshul Yadav ◽  
Pankaj Dnyandeo Indurkar
Keyword(s):  
Thin Films ◽  
Water Purification ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Composite Membranes ◽  
Separation And Purification ◽  
Metal Organic ◽  
Water And Wastewater ◽  
Polymer Supported ◽  
And Storage

Over the past few years, metal-organic frameworks have gained considerable attention. Metal-organic frameworks are widely regarded as promising materials for separation, catalysis, molecular recognition, and storage applications. The applications and potentials of engineered forms of metal-organic frameworks such as thin films and membranes supported on various substrates in the area of water purification are discussed in this chapter. Metal-organic frameworks applications in separation and purification techniques with metal-organic frameworks-based membrane matrix is underlined at their promising levels. Metal-organic frameworks polymer composite membranes, including polymer-supported metal-organic frameworks membranes, are identified and the recent development are discussed. This chapter will provide a comprehensive assessment of recent studies on the removal of various contaminants from water using metal-organic frameworks-based membranes.

One-pot synthesis of folic acid encapsulated upconversion nanoscale metal organic frameworks for targeting, imaging and pH responsive drug release

2016 ◽  
Vol 45 (45) ◽  
pp. 18120-18132 ◽  
Author(s):  
Angshuman Ray Chowdhuri ◽  
Dipranjan Laha ◽  
Srimanta Pal ◽  
Parimal Karmakar ◽  
Sumanta Kumar Sahu
Keyword(s):  
Drug Delivery ◽  
Folic Acid ◽  
Drug Release ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Ph Responsive ◽  
One Pot ◽  
Anticancer Drug Delivery ◽  
Metal Organic ◽  
One Step

A folic acid conjugated upconversion nanoscale metal organic framework is developed as a smart material in one step for targeted anticancer drug delivery.

scholarly journals Metal-Organic Framework Thin Films as Versatile Chemical Sensing Materials

2021 ◽  
Author(s):  
James Ellis ◽  
Scott Crawford ◽  
Ki-Joong Kim
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Lewis Acid ◽  
Chemical Sensing ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Acid Base ◽  
Metal Organic ◽  
Organic Framework

Metal-organic frameworks (MOFs) have been widely investigated as chemical sensing materials due to their periodic porosity, tunable chemical functionalities such as Lewis acid/base sites, potential conductivity and/or sensitive optical properties....

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>

Engineering Porosity Through Defects in a Giant Pore Metal–Organic Framework

2020 ◽  
Author(s):  
Adam Sapnik ◽  
Duncan Johnstone ◽  
Sean M. Collins ◽  
Giorgio Divitini ◽  
Alice Bumstead ◽  
...  
Keyword(s):  
Distribution Function ◽  
Ball Milling ◽  
Local Structure ◽  
Pair Distribution Function ◽  
Function Analysis ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Defect Engineering ◽  
Metal Organic ◽  
Unsaturated Metal Sites

<p>Defect engineering is a powerful tool that can be used to tailor the properties of metal–organic frameworks (MOFs). Here, we incorporate defects through ball milling to systematically vary the porosity of the giant pore MOF, MIL-100 (Fe). We show that milling leads to the breaking of metal–linker bonds, generating more coordinatively unsaturated metal sites, and ultimately causes amorphisation. Pair distribution function analysis shows the hierarchical local structure is partially</p><p>retained, even in the amorphised material. We find that the solvent toluene stabilises the MIL-100 (Fe) framework against collapse and leads to a substantial rentention of porosity over the non-stabilised material.</p>

Metal-Organic Frameworks vs. Buffers: Case Study of UiO-66 Stability

2020 ◽  
Author(s):  
Daniel Bůžek ◽  
Slavomír Adamec ◽  
Kamil Lang ◽  
Jan Demel
Keyword(s):  
Inductively Coupled Plasma ◽  
Buffer Capacity ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Analytical Techniques ◽  
Aqueous Dispersions ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry ◽  
Metal Organic

<div><p>UiO-66 is a zirconium-based metal-organic framework (MOF) that has numerous applications. Our group recently determined that UiO-66 is not as inert in aqueous dispersions as previously reported in the literature. The present work therefore assessed the behaviour of UiO-66 in buffers: 2-amino-2-(hydroxymethyl)-1,3-propanediol (TRIS), 4-(2-hydroxyethyl)piperazine-1-ethane sulfonic acid (HEPES), N-ethylmorpholine (NEM) and phosphate buffer (PB), all of which are commonly used in many UiO-66 applications. High pressure liquid chromatography and inductively coupled plasma mass spectrometry were used to monitor degradation of the MOF. In each buffer, the terephthalate linker was released to some extent, with a more pronounced leaching effect in the saline forms of these buffers. The HEPES buffer was found to be the most benign, whereas NEM and PB should be avoided at any concentration as they were shown to rapidly degrade the UiO-66 framework. Low concentration TRIS buffers are also recommended, although these offer minimal buffer capacity to adjust pH. Regardless of the buffer used, rapid terephthalate release was observed, indicating that the UiO-66 was attacked immediately after mixing with the buffer. In addition, the dissolution of zirconium, observed in some cases, intensified the UiO-66 decomposition process. These results demonstrate that sensitive analytical techniques have to be used to monitor the release of MOF components so as to quantify the stabilities of these materials in liquid environments.</p></div>

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