Graphene–Metal–Organic Framework-Modified Electrochemical Sensors

2019 ◽  
pp. 275-296 ◽  
Author(s):  
D. Durgalakshmi ◽  
R. Ajay Rakkesh ◽  
J. Mohanraj
Keyword(s):  
Electrochemical Sensors ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Organic Framework

Highly sensitive analysis of organometallic compounds based on molecularly imprinted electrochemical sensors

2017 ◽  
Vol 9 (11) ◽  
pp. 1771-1778 ◽  
Author(s):  
Xiaoping Wei ◽  
Ting Wu ◽  
Yali Yuan ◽  
Xionghui Ma ◽  
Jianping Li
Keyword(s):  
Electrochemical Sensor ◽  
Electrochemical Sensors ◽  
Metal Organic Framework ◽  
Organometallic Compounds ◽  
Molecularly Imprinted ◽  
Sensitive Analysis ◽  
Highly Sensitive ◽  
Metal Organic ◽  
Organic Framework

A highly sensitive molecularly imprinted electrochemical sensor constructed by a novel microporous metal–organic-framework for the detection of organometallic compounds was developed.

scholarly journals Recent Developments in the Synthesis and Applications of Metal Organic Framework: A Concise Review

2021 ◽  
Vol 33 (5) ◽  
pp. 956-962
Author(s):  
Chandan Adhikari ◽  
Rehana Farooq
Keyword(s):  
Drug Delivery ◽  
Porous Materials ◽  
Electrochemical Sensors ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Inorganic Materials ◽  
Synthetic Methods ◽  
Concise Review ◽  
Metal Organic ◽  
Organic Framework

Metal organic frameworks (MOFs) are one of those compounds which have drawn attention in various applications due to their several interesting properties like tunable shape, size, pore size, easy functionalization, high surface area, pore volume, etc. Metal organic frameworks due to their uniform structures, tunable porosity, wide variety and stability on various topology, geometry, dimension and chemical functions of the molecular network give a remarkable structural diversity in comparison to other porous materials. This enables scientists to handle numerous framework structures, porosity and functionality effectively. The unique structural architecture and tunable properties of MOF’s makes them an interesting hybrid material consisting of organic and inorganic materials. MOF can be randomly constructed like Lego bricks and superior in terms of versatility in comparisson to other porous materials. A number of MOFs containing a wide variety of metal e.g. zinc, copper, iron, aluminium, magnesium, chromium, zirconium, gadolinium, manganese are gaining rapid growth in commercial markets for gas storage, adsorption, separation and catalytic applications. This concise review emphasizes various synthetic methods e.g. solvothermal process, hydrothermal synthesis, electrochemical synthesis, microwave synthesis, sonochemical synthesis, mechanochemical synthesis, of metal organic framework developed in the last few decades. It also addresses various applications of metal organic framework e.g. hydrogen storage, gas adsorption, drug delivery systems and bioimaging agents, biocatalysts, biosensors, electrochemical sensors, etc. It also comments on various challenges and futuristic applications of metal organic frameworks in various field e.g. liquid wate management, gaseous waste management, sunlight assisted catalysis, water purification, building materials, electronic devices, battery technologies, targeted drug delivery, solar cells, etc. of science and technology in coming decades.

scholarly journals Metal-Organic-Framework FeBDC-Derived Fe3O4 for Non-Enzymatic Electrochemical Detection of Glucose

Sensors ◽  
2020 ◽  
Vol 20 (17) ◽  
pp. 4891 ◽  
Author(s):  
Syauqi Abdurrahman Abrori ◽  
Ni Luh Wulan Septiani ◽  
Nugraha ◽  
Isa Anshori ◽  
Suyatman ◽  
...  
Keyword(s):  
Electrochemical Detection ◽  
Electrochemical Sensors ◽  
Metal Organic Framework ◽  
Supporting Electrolyte ◽  
Differential Pulse ◽  
Measurement Results ◽  
Sensitivity And Selectivity ◽  
Metal Organic ◽  
Active Research ◽  
Organic Framework

Present-day science indicates that developing sensors with excellent sensitivity and selectivity for detecting early signs of diseases is highly desirable. Electrochemical sensors offer a method for detecting diseases that are simpler, faster, and more accurate than conventional laboratory analysis methods. Primarily, exploiting non-noble-metal nanomaterials with excellent conductivity and large surface area is still an area of active research due to its highly sensitive and selective catalysts for electrochemical detection in enzyme-free sensors. In this research, we successfully fabricate Metal-Organic Framework (MOF) FeBDC-derived Fe3O4 for non-enzymatic electrochemical detection of glucose. FeBDC synthesis was carried out using the solvothermal method. FeCl2.4H2O and Benzene-1,4-dicarboxylic acid (H2BDC) are used as precursors to form FeBDC. The materials were further characterized utilizing X-ray Powder Diffraction (XRD), Scanning Electron Microscopy (SEM), and Fourier-Transform Infrared Spectroscopy (FTIR). The resulting MOF yields good crystallinity and micro-rod like morphology. Electrochemical properties were tested using Cyclic Voltammetry (CV) and Differential Pulse Voltammetry (DPV) with a 0.1 M of Phosphate Buffer Saline (PBS pH 7.4) solution as the supporting electrolyte. The measurement results show the reduction and oxidation peaks in the CV curve of FeBDC, as well as Fe3O4. Pyrolysis of FeBDC to Fe3O4 increases the peak of oxidation and reduction currents. The Fe3O4 sample obtained has a sensitivity of 4.67 µA mM−1.cm−2, a linear range between 0.0 to 9.0 mM, and a glucose detection limit of 15.70 µM.

Metal-organic framework with multienzymes activity as biosensing platform for real-time electrochemical detection of nitric oxide and hydrogen peroxide

The Analyst ◽  
2021 ◽  
Author(s):  
Pinghua Ling ◽  
Xiaona Zang ◽  
caihua Qian ◽  
Feng Gao
Keyword(s):  
Active Site ◽  
Electrochemical Sensors ◽  
Metal Organic Framework ◽  
Catalytic Performance ◽  
Artificial Enzymes ◽  
High Chemical ◽  
Metal Organic ◽  
Excellent Catalytic Performance ◽  
High Chemical Stability ◽  
Organic Framework

Metal-Organic Framework (MOF) with large surface area, exposed active site, excellent catalytic performance and high chemical stability has been used as artificial enzymes and designed for nonenzymatic electrochemical sensors. Here,...

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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