scholarly journals A Sr 2+ -metal–organic framework with high chemical stability: synthesis, crystal structure and photoluminescence property

2017 ◽  
Vol 375 (2084) ◽  
pp. 20160026 ◽  
Author(s):  
Yan-Yuan Jia ◽  
Xiao-Ting Liu ◽  
Wen-He Wang ◽  
Li-Zhu Zhang ◽  
Ying-Hui Zhang ◽  
...  
Keyword(s):  
Chemical Stability ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Photoluminescence Property ◽  
Environment Friendly ◽  
Crystalline Materials ◽  
Practical Applications ◽  
Square Channel ◽  
Metal Organic ◽  
The Stability

Metal–organic frameworks (MOFs) are typically built by assembly of metal centres and organic linkers, and have emerged as promising crystalline materials in a variety of fields. However, the stability of MOFs is a key limitation for their practical applications. Herein, we report a novel Sr 2+ -MOF [Sr 4 (Tdada) 2 (H 2 O) 3 (DMF) 2 ] (denoted as NKU- 105 , NKU = Nankai University; H 4 Tdada = 5,5'-((thiophene-2,5-dicar bonyl)bis(azanediyl))diisophthalic acid; DMF =  N,N -dimethylformamide) featuring an open square channel of about 6 Å along the c -axis. Notably, NKU- 105 exhibits much outstanding chemical stability against common organic solvents, boiling water, acids and bases, relative to most MOF materials. Furthermore, NKU- 105 is an environment-friendly luminescent material with a bright cyan emission. This article is part of the themed issue ‘Coordination polymers and metal–organic frameworks: materials by design’.

Binder-Free mechanochemical metal-organic framework nanocrystal coatings

Nanoscale ◽  
2022 ◽  
Author(s):  
Rijia Lin ◽  
Yuqi Yao ◽  
Muhammad Yazid Bin Zulkifli ◽  
Xuemei Li ◽  
Shuai Gao ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Practical Applications ◽  
Metal Organic ◽  
Binder Free ◽  
Organic Framework

The practical applications of metal-organic frameworks (MOFs) usually require their assembly into mechanically robust structures, usually achieved via coating onto various types of substrates. This paper describes a simple, scalable,...

Polymorphism in a Two-Dimensional Copper(I) Metal-Organic Framework with the ligand bis(4-pyridylthio)methane

CrystEngComm ◽  
2021 ◽  
Author(s):  
Olaya Paz Gomez ◽  
Rosa Carballo ◽  
Ana Belen Lago ◽  
Ezequiel M. Vazquez-Lopez
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Common Phenomenon ◽  
Two Dimensional ◽  
Structure Property ◽  
Crystalline Materials ◽  
Metal Organic ◽  
Organic Framework

Polymorphism is a common phenomenon in crystalline materials but it has barely been studied in the field of metal organic frameworks. The study of polymorphism is useful to investigate structure–property...

Governing metal–organic frameworks towards high stability

2016 ◽  
Vol 52 (55) ◽  
pp. 8501-8513 ◽  
Author(s):  
Na Li ◽  
Jian Xu ◽  
Rui Feng ◽  
Tong-Liang Hu ◽  
Xian-He Bu
Keyword(s):  
Chemical Composition ◽  
High Stability ◽  
Metal Organic Frameworks ◽  
Crucial Issue ◽  
Practical Applications ◽  
Metal Organic ◽  
The Stability

Stability of MOFs is a crucial issue for their practical applications, which might be improved by varying their chemical composition and/or structurally tuning them. Several strategies for enhancing the stability of MOFs were provided.

scholarly journals Enhancing the stability and porosity of penetrated metal–organic frameworks through the insertion of coordination sites

2018 ◽  
Vol 9 (4) ◽  
pp. 950-955 ◽  
Author(s):  
Rui Feng ◽  
Yan-Yuan Jia ◽  
Zhao-Yang Li ◽  
Ze Chang ◽  
Xian-He Bu
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Structure And Properties ◽  
Coordination Sites ◽  
Metal Organic ◽  
The Stability ◽  
Enhanced Stability ◽  
Organic Framework

Guided by the insertion of coordination sites within ligands, an interpenetrated metal–organic framework (MOFs) NKU-112 and a self-penetrated framework NKU-113 were obtained. The enhanced stability and porosity of NKU-113 prove the efficiency of the method for the structure and properties modulation of penetrated MOFs.

Eu3+ functionalized robust membrane based on the post-synthetic copolymerization of metal-organic framework and ethyl methacrylate

2021 ◽  
Author(s):  
Jie Min ◽  
Haifeng Lu ◽  
Bing Yan
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Crystalline Materials ◽  
Ethyl Methacrylate ◽  
Subsequent Processing ◽  
Metal Organic ◽  
Organic Framework

Metal-organic frameworks (MOFs) are recognized as a class of promising crystalline materials. However, their subsequent processing and shaping still remains a challenge, one emerging strategy is to hybridize MOFs with...

Metal Organic Framework Based Catalytic Nanoreactors (CatNRs): Synthetic Challenges and Applications

2021 ◽  
Author(s):  
Soumen Dutta ◽  
In Su Lee
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalysis ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Protective Shell ◽  
Metal Organic ◽  
The Stability ◽  
Organic Framework

Catalytic nanoreactors have become hugely important in the field of heterogeneous catalysis due to their intriguing catalytic activity and the stability of the nanocatalysts inside the protective shell. Metal-organic frameworks...

scholarly journals Synthesis of Stable Hierarchical MIL-101(Cr) with Enhanced Catalytic Activity in the Oxidation of Indene

Catalysts ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 394 ◽  
Author(s):  
Tian Zhao ◽  
Ming Dong ◽  
Ling Yang ◽  
Yuejun Liu
Keyword(s):  
Catalytic Activity ◽  
Hierarchical Structure ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Structural Defects ◽  
Controllable Synthesis ◽  
Phenylphosphonic Acid ◽  
Practical Applications ◽  
Metal Organic ◽  
Dye Molecule

Nowadays, the controllable synthesis of stable hierarchical metal–organic frameworks (MOFs) is very important for practical applications, especially in catalysis. Herein, a well-known chromium–benzenedicarboxylate metal–organic framework, MIL-101(Cr), with a stable hierarchical structure, was produced by using phenylphosphonic acid (PPOA) as a modulator via the hydrothermal method. The presence of phenylphosphonic acid could create structural defects and generate larger mesopores. The synthesized hierarchical MIL-101(Cr) possesses relatively good porosity, and the larger mesopores had widths of 4–10 nm. The hierarchical MIL-101(Cr) showed significant improvement for catalytic activity in the oxidation of indene. Further, the presence of a hierarchical structure could largely enhance large dye molecule uptake properties by impregnating.

Gold nanoparticles decorated rGO-encapsulated metal-organic frameworks composite sensor for the detection of dopamine

2020 ◽  
Author(s):  
Shaoming Yang ◽  
Jian Zhang ◽  
Chaopeng Bai ◽  
Kaiqiang Deng
Keyword(s):  
Gold Nanoparticles ◽  
Modified Electrode ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
High Catalytic Activity ◽  
Practical Applications ◽  
Reduced Graphene ◽  
Morphology And Structure ◽  
Metal Organic ◽  
Composite Sensor

In this study by way of encapsulation of reduced graphene oxide (rGO) into Ni-based metal-organic framework (Ni-MOFs) structure, the composite rGO@Ni-MOFs was first prepared. Then gold nanoparticles (AuNPs) decorated rGO@Ni-MOFs (rGO@Ni-MOFs/AuNPs) was obtained through the electrodeposition. The morphology and structure of rGO@Ni-MOFs/AuNPs were characterized by SEM, FTIR and XRD. The rGO@Ni-MOFs/AuNPs modified electrode was used for the detection of dopamine (DA). The combining the catalysis from Ni-MOFs and AuNPs with the conductivity of rGO endowed rGO@Ni-MOFs/AuNPs with synergetic high catalytic activity to the electrochemical oxidation of DA. The developed modified electrode had a good linear relationship with DA in the concentration range of 0.5 μM～120 μM, and the detection limit was 0.33 μM (S/N=3). Additionally, the potential interferents, electrode stability, reproducibility and practical applications were also studied and satisfactory results were obtained.

Metal organic framework based catalysts for CO2 conversion

2017 ◽  
Vol 4 (3) ◽  
pp. 345-361 ◽  
Author(s):  
James W. Maina ◽  
Cristina Pozo-Gonzalo ◽  
Lingxue Kong ◽  
Jürg Schütz ◽  
Matthew Hill ◽  
...  
Keyword(s):  
Surface Chemistry ◽  
Specific Surface ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Co2 Conversion ◽  
Crystalline Materials ◽  
Pore Sizes ◽  
Surface Areas ◽  
Metal Organic ◽  
Specific Surface Areas

Metal organic frameworks (MOFs) are hybrid crystalline materials, exhibiting high specific surface areas, controllable pore sizes and surface chemistry.

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>

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