MOF catalysis of FeII-to-FeIII reaction for an ultrafast and one-step generation of the Fe2O3@MOF composite and uranium(vi) reduction by iron(ii) under ambient conditions

2016 ◽  
Vol 52 (61) ◽  
pp. 9538-9541 ◽  
Author(s):  
Yang Yang Xiong ◽  
Jian Qiang Li ◽  
Chang Sheng Yan ◽  
Heng Ya Gao ◽  
Jian Ping Zhou ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Ambient Conditions ◽  
Metal Organic ◽  
One Step ◽  
Step Generation ◽  
First Time

Surface is for the first time attested to be one of outstanding merits of metal–organic frameworks (MOFs).

Enhancement of Carbon Dioxide Adsorption by Lithium Decorating and Fullerene Encapsulating in Metal-Organic Frameworks

2013 ◽  
Vol 773 ◽  
pp. 927-931
Author(s):  
Rui Feng Lu ◽  
De Wei Rao ◽  
Zhao Shun Meng ◽  
Kai Ming Deng
Keyword(s):  
Metal Organic Frameworks ◽  
Carbon Dioxide Adsorption ◽  
Grand Canonical Monte Carlo ◽  
Ambient Conditions ◽  
Li Doping ◽  
Lithium Doping ◽  
Crystal Density ◽  
Metal Organic ◽  
Density Surface ◽  
Grand Canonical

Using grand canonical Monte Carlo method, the capacities of CO2adsorption in IRMOF-12 and-14 are simulated at ambient conditions. We have theoretically found that CO2uptake can be greatly enhanced by either lithium doping or fullerene impregnating, and the influence of the Li doping is more significant than that of C60impregnation. Furthermore, the CO2storage capacities of IRMOFs after both Li doping and C60impregnating are improved to be about 30 times those of corresponding pristine structures. To further understand the mechanism, we analyzed the distribution pattern of CO2adsorption in materials and investigated the relationships between CO2uptakes and crystal density, surface area per volume and per mass, and pore volume per volume and per mass in detail.

scholarly journals The nanoscaled metal-organic framework ICR-2 as a carrier of porphyrins for photodynamic therapy

2018 ◽  
Vol 9 ◽  
pp. 2960-2967 ◽  
Author(s):  
Jan Hynek ◽  
Sebastian Jurík ◽  
Martina Koncošová ◽  
Jaroslav Zelenka ◽  
Ivana Křížová ◽  
...  
Keyword(s):  
Inorganic Chemistry ◽  
Photodynamic Therapy ◽  
Photophysical Properties ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Biological Applications ◽  
Nanoparticle Surface ◽  
Metal Organic ◽  
Unsaturated Metal Sites ◽  
First Time

Nanosized porphyrin-containing metal-organic frameworks (MOFs) attract considerable attention as solid-state photosensitizers for biological applications. In this study, we have for the first time synthesised and characterised phosphinate-based MOF nanoparticles, nanoICR-2 (Inorganic Chemistry Rez). We demonstrate that nanoICR-2 can be decorated with anionic 5,10,15,20-tetrakis(4-R-phosphinatophenyl)porphyrins (R = methyl, isopropyl, phenyl) by utilizing unsaturated metal sites on the nanoparticle surface. The use of these porphyrins allows for superior loading of the nanoparticles when compared with commonly used 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin. The nanoICR-2/porphyrin composites retain part of the free porphyrins photophysical properties, while the photodynamic efficacy is strongly affected by the R substituent at the porphyrin phosphinate groups. Thus, phosphinatophenylporphyrin with phenyl substituents has the strongest photodynamic efficacy due to the most efficient cellular uptake.

scholarly journals Influence of Ligand Functionalization of UiO-66-Based Metal-Organic Frameworks When Used as Sorbents in Dispersive Solid-Phase Analytical Microextraction for Different Aqueous Organic Pollutants

Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2869 ◽  
Author(s):  
Iván Taima-Mancera ◽  
Priscilla Rocío-Bautista ◽  
Jorge Pasán ◽  
Juan Ayala ◽  
Catalina Ruiz-Pérez ◽  
...  
Keyword(s):  
High Performance ◽  
Solid Phase ◽  
Metal Organic Frameworks ◽  
Aqueous Sample ◽  
Optimization Study ◽  
Relative Standard ◽  
Polycyclic Aromatic ◽  
Metal Organic ◽  
Array Detection ◽  
First Time

Four metal-organic frameworks (MOFs), specifically UiO-66, UiO-66-NH2, UiO-66-NO2, and MIL-53(Al), were synthesized, characterized, and used as sorbents in a dispersive micro-solid phase extraction (D-µSPE) method for the determination of nine pollutants of different nature, including drugs, phenols, polycyclic aromatic hydrocarbons, and personal care products in environmental waters. The D-µSPE method, using these MOFs as sorbents and in combination with high-performance liquid chromatography (HPLC) and diode-array detection (DAD), was optimized. The optimization study pointed out to UiO-66-NO2 as the best MOF to use in the multi-component determination. Furthermore, the utilization of isoreticular MOFs based on UiO-66 with the same topology but different functional groups, and MIL-53(Al) to compare with, allowed us for the first time to evaluate the influence of such functionalization of the ligand with regards to the efficiency of the D-µSPE-HPLC-DAD method. Optimum conditions included: 20 mg of UiO-66-NO2 MOF in 20 mL of the aqueous sample, 3 min of agitation by vortex and 5 min of centrifugation, followed by the use of only 500 µL of acetonitrile as desorption solvent (once the MOF containing analytes was separated), 5 min of vortex and 5 min of centrifugation. The validation of the D-µSPE-HPLC-DAD method showed limits of detection down to 1.5 ng·L−1, average relative recoveries of 107% for a spiked level of 1.50 µg·L−1, and inter-day precision values with relative standard deviations lower than 14%, for the group of pollutants considered.

scholarly journals Zirconium-Based Metal Organic Frameworks for the Capture of Carbon Dioxide and Ethanol Vapour. A Comparative Study

Molecules ◽  
2021 ◽  
Vol 26 (24) ◽  
pp. 7620
Author(s):  
Meryem Saidi ◽  
Phuoc Hoang Ho ◽  
Pankaj Yadav ◽  
Fabrice Salles ◽  
Clarence Charnay ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Metal Organic Frameworks ◽  
Van Der Waals Interactions ◽  
Ambient Conditions ◽  
Ethanol Vapour ◽  
Metal Organic ◽  
Experimental Findings ◽  
Two Parameters ◽  
Low Coverage ◽  
Ethanol Adsorption

This paper reports on the comparison of three zirconium-based metal organic frameworks (MOFs) for the capture of carbon dioxide and ethanol vapour at ambient conditions. In terms of efficiency, two parameters were evaluated by experimental and modeling means, namely the nature of the ligands and the size of the cavities. We demonstrated that amongst three Zr-based MOFs, MIP-202 has the highest affinity for CO2 (−50 kJ·mol−1 at low coverage against around −20 kJ·mol−1 for MOF-801 and Muc Zr MOF), which could be related to the presence of amino functions borne by its aspartic acid ligands as well as the presence of extra-framework anions. On the other side, regardless of the ligand size, these three materials were able to adsorb similar amounts of carbon dioxide at 1 atm (between 2 and 2.5 µmol·m−2 at 298 K). These experimental findings were consistent with modeling studies, despite chemisorption effects, which could not be taken into consideration by classical Monte Carlo simulations. Ethanol adsorption confirmed these results, higher enthalpies being found at low coverage for the three materials because of stronger van der Waals interactions. Two distinct sorption processes were proposed in the case of MIP-202 to explain the shape of the enthalpic profiles.

One-step growth of isoreticular luminescent metal–organic frameworks on cotton fibers

RSC Advances ◽  
2015 ◽  
Vol 5 (20) ◽  
pp. 15198-15204 ◽  
Author(s):  
R. R. Ozer ◽  
J. P. Hinestroza
Keyword(s):  
Metal Organic Frameworks ◽  
Precipitation Method ◽  
Cotton Fibers ◽  
Direct Precipitation ◽  
Metal Organic ◽  
One Step ◽  
Lanthanide Metal ◽  
Step Growth ◽  
Direct Precipitation Method ◽  
Temperature Water

A series of isoreticular lanthanide metal–organic frameworks, Ln-MOFs (Ln = Eu, Gd, and Tb), were directly grown on cotton fibers using a room temperature water-based direct precipitation method.

A DFT study of RuO4 interactions with porous materials: metal–organic frameworks (MOFs) and zeolites

2018 ◽  
Vol 20 (24) ◽  
pp. 16770-16776 ◽  
Author(s):  
Siwar Chibani ◽  
Michael Badawi ◽  
Thierry Loiseau ◽  
Christophe Volkringer ◽  
Laurent Cantrel ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Porous Materials ◽  
Metal Organic Frameworks ◽  
Dft Study ◽  
Hydrated Form ◽  
Metal Organic ◽  
First Time ◽  
Potential Use ◽  
Multiple Hydrogen Bonds

The potential use of zeolite and MOF materials for the capture of RuO4 has been investigated for the first time. A hydrated form of HKUST-1 could be a promising sorbent due to its ability to form multiple hydrogen bonds.

3D hollow cage copper cobalt sulfide derived from metal–organic frameworks for high-performance asymmetric supercapacitors

CrystEngComm ◽  
2021 ◽  
Author(s):  
Jiaqi Wang ◽  
Yiling Quan ◽  
Guoxiang Wang ◽  
Dazhi Wang ◽  
Jie Xiao ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
High Performance ◽  
Solvothermal Method ◽  
Metal Organic Frameworks ◽  
Cobalt Sulfide ◽  
Large Specific Surface Area ◽  
Asymmetric Supercapacitors ◽  
Metal Organic ◽  
One Step

Metal–organic frameworks (MOFs) attracted considerable attention through their large specific surface area and excellent adjustable voids. A one-step solvothermal method is proposed herein to fabricate the 3D hollow cage copper-cobalt...

Metal–organic frameworks: a universal strategy towards super-elastic hydrogels

2019 ◽  
Vol 10 (18) ◽  
pp. 2263-2272 ◽  
Author(s):  
Huaizhi Liu ◽  
Hao Peng ◽  
Yumeng Xin ◽  
Jiuyang Zhang
Keyword(s):  
Drug Delivery ◽  
Mechanical Performance ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
High Loading ◽  
Loading Capacity ◽  
Metal Organic ◽  
First Time ◽  
Organic Framework

We reported for the first time using metal–organic framework (MOF) nanoparticles as effective nanofillers to significantly enhance the mechanical performance of hydrogels. The MOF hydrogels have been developed for drug delivery materials with high loading capacity and much extended drug releasing profiles.

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