scholarly journals Evaluation of two- and three-dimensional electrode platforms for the electrochemical characterization of organometallic catalysts incorporated in non-conducting metal–organic frameworks

2017 ◽  
Vol 46 (15) ◽  
pp. 4907-4911 ◽  
Author(s):  
Edgar Mijangos ◽  
Souvik Roy ◽  
Sonja Pullen ◽  
Reiner Lomoth ◽  
Sascha Ott

The development of a reliable platform to electrochemically probe a molecular diiron complex, [FeFe], grafted in a non-conductive metal–organic framework, UiO-66, is reported.

2021 ◽  
Vol 35 (1) ◽  
pp. 119-128
Author(s):  
S. Iram ◽  
T. Khurshid ◽  
S. Latif ◽  
M. Imran ◽  
F. Kanwal ◽  
...  

Metal organic frameworks are formed by the three-dimensional linkage of metal cores and organic linkers. In this work, bismuth-based metal organic framework (Bi-MOF) has been synthesized by using 5-hydroxyisophthalic acid (H2HIA) as linker via hydrothermal method. The said MOF was structurally characterized by UV/Vis, Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), 1H NMR, energy dispersive spectroscopy (EDS), thermogravimetric analysis (TGA) and X-ray diffraction technique. This MOF showed highly porous structure with surface area 1096 m2/g as determined by BET analysis. A model batch adsorption experiment was performed to evaluate the efficiency of methylene blue (MB) dye removal from aqueous media. It was found that monolayer adsorption capacity calculated from the Langmuir isotherm was 0.6240 mg/g. Bi-MOF was also screened for its antibacterial and luminescent behavior.                     KEY WORDS: Bismuth, Metal-organic Frameworks, Luminescence, Sorption   Bull. Chem. Soc. Ethiop. 2021, 35(1), 119-128. DOI: https://dx.doi.org/10.4314/bcse.v35i1.10


2009 ◽  
Vol 362 (7) ◽  
pp. 2510-2514 ◽  
Author(s):  
Kou-Lin Zhang ◽  
Fang Zhou ◽  
Li-Min Yuan ◽  
Guo-Wang Diao ◽  
Seik Weng Ng

2015 ◽  
Vol 44 (15) ◽  
pp. 6871-6879 ◽  
Author(s):  
Mirosław Mączka ◽  
Bartosz Bondzior ◽  
Przemysław Dereń ◽  
Adam Sieradzki ◽  
Justyna Trzmiel ◽  
...  

A novel chromium(iii)-based luminescent metal–organic framework with perovskite architecture, [(CH3)2NH2][Na0.5Cr0.5(HCOO)3], was synthesized.


2021 ◽  
Author(s):  
Jian-Qiang Liu ◽  
Gaomin Ye ◽  
Chen Chen ◽  
Jingzhe Lin ◽  
Xinsheng Peng ◽  
...  

With steady development of metal-organic framework (MOF) materials, this peculiar class of three-dimensional materials finds application prospects in myriad of areas. The integration of different metals with varied categories of...


2020 ◽  
Vol 11 (34) ◽  
pp. 9173-9180 ◽  
Author(s):  
Naomi Biggins ◽  
Michael E. Ziebel ◽  
Miguel I. Gonzalez ◽  
Jeffrey R. Long

Single-crystal X-ray diffraction reveals structural influences on gas adsorption properties in anionic metal–organic frameworks.


Nanoscale ◽  
2021 ◽  
Vol 13 (38) ◽  
pp. 16244-16250
Author(s):  
Fangjing Mo ◽  
Qian Han ◽  
Min Chen ◽  
Hui Meng ◽  
Jiang Guo ◽  
...  

We synthesized stable magnesium 3,4,9,10-perylene tetracarboxylic acid metal–organic frameworks applied them in a PEC regenerated-biosensor along with target-triggered three-dimensional DNA Scaffold for ultrasensitive detection of microRNA 21.


2018 ◽  
Vol 47 (30) ◽  
pp. 10080-10092 ◽  
Author(s):  
Chris S. Hawes ◽  
Gearóid M. Ó Máille ◽  
Kevin Byrne ◽  
Wolfgang Schmitt ◽  
Thorfinnur Gunnlaugsson

Pyrrolo[3,2-b]pyrrole fluorophores are incorporated into metal–organic framework linkers, giving three-dimensional materials with responsive photoluminescence behaviour.


2020 ◽  
Author(s):  
Jesse Park ◽  
Brianna Collins ◽  
Lucy Darago ◽  
Tomce Runcevski ◽  
Michael Aubrey ◽  
...  

<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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