scholarly journals Quantification of the mixed-valence and intervalence charge transfer properties of a cofacial metal–organic framework via single crystal electronic absorption spectroscopy

2020 ◽  
Vol 11 (20) ◽  
pp. 5213-5220
Author(s):  
Patrick W. Doheny ◽  
Jack K. Clegg ◽  
Floriana Tuna ◽  
David Collison ◽  
Cameron J. Kepert ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Mixed Valence ◽  
Three Dimensional ◽  
Fundamental Understanding ◽  
Intervalence Charge Transfer ◽  
Metal Organic ◽  
Transfer Properties ◽  
Transfer Mechanisms

Gaining a fundamental understanding of charge transfer mechanisms in three-dimensional Metal–Organic Frameworks (MOFs) is crucial to the development of electroactive and conductive porous materials.

scholarly journals Probing charge transfer characteristics in a donor–acceptor metal–organic framework by Raman spectroelectrochemistry and pressure-dependence studies

2018 ◽  
Vol 20 (40) ◽  
pp. 25772-25779 ◽  
Author(s):  
Pavel M. Usov ◽  
Chanel F. Leong ◽  
Bun Chan ◽  
Mikihiro Hayashi ◽  
Hiroshi Kitagawa ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Pressure Dependence ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Transfer Characteristics ◽  
Donor Acceptor ◽  
Metal Organic ◽  
Transfer Properties ◽  
Organic Framework

Donor–Acceptor Metal–Organic Frameworks display redox and pressure dependent charge transfer properties.

scholarly journals Effects of intervalence charge transfer interaction between π-stacked mixed valent tetrathiafulvalene ligands on the electrical conductivity of 3D metal–organic frameworks

2021 ◽  
Author(s):  
Shiyu Zhang ◽  
Dillip K. Panda ◽  
Ashok Yadav ◽  
Wei Zhou ◽  
Sourav Saha
Keyword(s):  
Electrical Conductivity ◽  
Charge Transfer ◽  
Space Charge ◽  
Metal Organic Frameworks ◽  
Three Dimensional ◽  
Charge Movement ◽  
Charge Transfer Interaction ◽  
Intervalence Charge Transfer ◽  
Metal Organic

Through-space charge movement enabled by intervalence charge transfer interactions between π-stacked mixed-valent tetrathiafulvalene ligands creates electrical conductivity in three-dimensional metal–organic frameworks.

scholarly journals Luminescent, sorptive and antibacterial potential of bismuth-organic framework

2021 ◽  
Vol 35 (1) ◽  
pp. 119-128
Author(s):  
S. Iram ◽  
T. Khurshid ◽  
S. Latif ◽  
M. Imran ◽  
F. Kanwal ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Aqueous Media ◽  
Three Dimensional ◽  
Batch Adsorption ◽  
X Ray Diffraction ◽  
Bet Analysis ◽  
Metal Organic ◽  
Ft Ir ◽  
Organic Framework

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

scholarly journals Influence of structure–activity relationships on through-space intervalence charge transfer in metal–organic frameworks with cofacial redox-active units

2019 ◽  
Vol 10 (5) ◽  
pp. 1392-1400 ◽  
Author(s):  
Bowen Ding ◽  
Carol Hua ◽  
Cameron J. Kepert ◽  
Deanna M. D'Alessandro
Keyword(s):  
Charge Transfer ◽  
Metal Organic Frameworks ◽  
Redox Active Ligands ◽  
Structure Activity Relationships ◽  
Structure Activity ◽  
Redox Active ◽  
Intervalence Charge Transfer ◽  
Metal Organic

Metal–organic frameworks incorporating cofacially-aligned redox-active ligands exhibit through-space intervalence charge transfer phenomena.

Synthesis, Characterization, and Intervalence Charge Transfer Properties of a Series of Rhenium(I)−Iron(III) Mixed-Valence Compounds

1999 ◽  
Vol 38 (3) ◽  
pp. 606-612 ◽  
Author(s):  
Brian W. Pfennig ◽  
Jamie L. Cohen ◽  
Irene Sosnowski ◽  
Nathan M. Novotny ◽  
Douglas M. Ho
Keyword(s):  
Charge Transfer ◽  
Mixed Valence ◽  
Intervalence Charge Transfer ◽  
Mixed Valence Compounds ◽  
Transfer Properties

Through-Space Intervalence Charge Transfer as a Mechanism for Charge Delocalization in Metal–Organic Frameworks

2018 ◽  
Vol 140 (21) ◽  
pp. 6622-6630 ◽  
Author(s):  
Carol Hua ◽  
Patrick W. Doheny ◽  
Bowen Ding ◽  
Bun Chan ◽  
Michelle Yu ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Metal Organic Frameworks ◽  
Charge Delocalization ◽  
Intervalence Charge Transfer ◽  
Metal Organic

scholarly journals Optimization of Cost-Effective and Reproducible Flexible Humidity Sensors Based on Metal-Organic Frameworks

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6981
Author(s):  
Victor Toral ◽  
Florin C. Loghin ◽  
Antonio Rodríguez-Diéguez ◽  
Alejandro Lapresta-Fernández ◽  
Diego P. Morales ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Three Dimensional ◽  
Cost Effective ◽  
Film Deposition ◽  
Flexible Substrates ◽  
Humidity Sensors ◽  
Cost Effective Method ◽  
Highly Sensitive ◽  
Metal Organic

In this letter, we present the extension of a previous work on a cost-effective method for fabricating highly sensitive humidity sensors on flexible substrates with a reversible response, allowing precise monitoring of the humidity threshold. In that work we demonstrated the use of three-dimensional metal-organic framework (MOF) film deposition based on the perylene-3,4,9,10-tetracarboxylate linker, potassium as metallic center and the interspacing of silver interdigitated electrodes (IDEs) as humidity sensors. In this work, we study one of the most important issues in efficient and reproducible mass production, which is to optimize the most important processes’ parameters in their fabrication, such as controlling the thickness of the sensor’s layers. We demonstrate this method not only allows for the creation of humidity sensors, but it also is possible to change the humidity value that changes the actuator state.

scholarly journals Charge-transfer interactions between fullerenes and a mesoporous tetrathiafulvalene-based metal–organic framework

2019 ◽  
Vol 10 ◽  
pp. 1883-1893 ◽  
Author(s):  
Manuel Souto ◽  
Joaquín Calbo ◽  
Samuel Mañas-Valero ◽  
Aron Walsh ◽  
Guillermo Mínguez Espallargas
Keyword(s):  
Electrical Conductivity ◽  
Charge Transfer ◽  
Density Functional ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Spectroscopic Techniques ◽  
Functional Theory ◽  
Guest Molecules ◽  
Crucial Step ◽  
Metal Organic

The design of metal–organic frameworks (MOFs) incorporating electroactive guest molecules in the pores has become a subject of great interest in order to obtain additional electrical functionalities within the framework while maintaining porosity. Understanding the charge-transfer (CT) process between the framework and the guest molecules is a crucial step towards the design of new electroactive MOFs. Herein, we present the encapsulation of fullerenes (C60) in a mesoporous tetrathiafulvalene (TTF)-based MOF. The CT process between the electron-acceptor C60 guest and the electron-donor TTF ligand is studied in detail by means of different spectroscopic techniques and density functional theory (DFT) calculations. Importantly, gas sorption measurements demonstrate that sorption capacity is maintained after encapsulation of fullerenes, whereas the electrical conductivity is increased by two orders of magnitude due to the CT interactions between C60 and the TTF-based framework.

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