Cerium-based UiO-66 metal–organic frameworks explored as efficient redox catalysts: titanium incorporation and generation of abundant oxygen vacancies

2019 ◽  
Vol 55 (93) ◽  
pp. 13959-13962 ◽  
Author(s):  
Yajun Zhang ◽  
Hanjiao Chen ◽  
Yi Pan ◽  
Xiaoliang Zeng ◽  
Xiaofang Jiang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Oxygen Vacancies ◽  
Metal Organic Frameworks ◽  
Redox Catalysts ◽  
Metal Organic ◽  
Titanium Incorporation ◽  
First Time

For the first time, UiO-66(Ce) was endowed with greatly improved redox photocatalytic activity via Ti incorporation, based on the formation of oxygen vacancies.

Aerobic oxidation of thiols to disulfides using iron metal–organic frameworks as solid redox catalysts

2010 ◽  
Vol 46 (35) ◽  
pp. 6476 ◽  
Author(s):  
Amarajothi Dhakshinamoorthy ◽  
Mercedes Alvaro ◽  
Hermenegildo Garcia
Keyword(s):  
Aerobic Oxidation ◽  
Metal Organic Frameworks ◽  
Iron Metal ◽  
Redox Catalysts ◽  
Metal Organic

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.

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.

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.

Synthesis of novel mesoporous sulfated zirconia nanosheets derived from Zr-based metal–organic frameworks

CrystEngComm ◽  
2020 ◽  
Vol 22 (1) ◽  
pp. 44-51 ◽  
Author(s):  
Ningyue Lu ◽  
Xuelian Zhang ◽  
Xiaoliang Yan ◽  
Dahai Pan ◽  
Binbin Fan ◽  
...  
Keyword(s):  
Sulfated Zirconia ◽  
Metal Organic Frameworks ◽  
Metal Organic ◽  
First Time

Flower-like mesoporous sulfated zirconia nanosheets (SZNs) were developed by pyrolysis of in situ sulfated Zr-MOFs for the first time.

Modifying Ag3VO4 with metal-organic frameworks for enhanced photocatalytic activity under visible light

2020 ◽  
Vol 239 ◽  
pp. 122078 ◽  
Author(s):  
BoYin Zhai ◽  
Ying Chen ◽  
YuNing Liang ◽  
YanHua Gao ◽  
JianLing Shi ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Metal Organic Frameworks ◽  
Metal Organic

scholarly journals Stimuli-responsive metal–organic frameworks gated by pillar[5]arene supramolecular switches

2015 ◽  
Vol 6 (3) ◽  
pp. 1640-1644 ◽  
Author(s):  
Li-Li Tan ◽  
Haiwei Li ◽  
Yu-Chen Qiu ◽  
Dai-Xiong Chen ◽  
Xin Wang ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Stimuli Responsive ◽  
Triggered Release ◽  
Metal Organic ◽  
Hybrid Platform ◽  
First Time

Mechanized monodisperse nano metal–organic frameworks (NMOFs) gated by carboxylatopillar[5]arene (CP5) switches with bio-friendly pH-triggered release capabilities were constructed for the first time as a new stimuli-responsive theranostic hybrid platform.

The effect of the aliphatic carboxylate linkers on the electronic structures, chemical bonding and optical properties of the uranium-based metal–organic frameworks

RSC Advances ◽  
2015 ◽  
Vol 5 (34) ◽  
pp. 26735-26748 ◽  
Author(s):  
Saumitra Saha ◽  
Udo Becker
Keyword(s):  
Optical Properties ◽  
Detailed Analysis ◽  
Computational Methods ◽  
Chemical Bonding ◽  
Electronic Structures ◽  
Computational Study ◽  
Metal Organic Frameworks ◽  
Metal Organic ◽  
First Time

A series of uranyl containing aliphatic dicarboxylate structures is studied using computational methods. Our computational study provides a detailed analysis of these MOFs and explores the effect of linkers on their properties for the first time.

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