scholarly journals Micro-spectroscopy of HKUST-1 metal–organic framework crystals loaded with tetracyanoquinodimethane: effects of water on host–guest chemistry and electrical conductivity

2019 ◽  
Vol 21 (46) ◽  
pp. 25678-25689 ◽  
Author(s):  
Miguel Rivera-Torrente ◽  
Matthias Filez ◽  
Christian Schneider ◽  
Ewout C. van der Feltz ◽  
Konrad Wolkersdörfer ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Spatial Distribution ◽  
Water Vapor ◽  
Metal Organic Framework ◽  
Next Generation ◽  
Metal Organic ◽  
Spectroscopy Studies ◽  
Organic Framework ◽  
Guest Chemistry

Guest@MOF materials have potential in next-generation materials for electroconductive devices. Micro-spectroscopy studies of TCNQ@HKUST-1 electroconductive composites revealed the effects of spatial distribution and water vapor on this material.

scholarly journals Correction: Micro-spectroscopy of HKUST-1 metal–organic framework crystals loaded with tetracyanoquinodimethane: effects of water on host–guest chemistry and electrical conductivity

2020 ◽  
Vol 22 (18) ◽  
pp. 10368-10368
Author(s):  
Miguel Rivera-Torrente ◽  
Matthias Filez ◽  
Christian Schneider ◽  
Ewout C. van der Feltz ◽  
Konrad Wolkersdörfer ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Metal Organic Framework ◽  
Chem Phys ◽  
Metal Organic ◽  
Phys Chem Chem Phys ◽  
Organic Framework ◽  
Guest Chemistry

Correction for ‘Micro-spectroscopy of HKUST-1 metal–organic framework crystals loaded with tetracyanoquinodimethane: effects of water on host–guest chemistry and electrical conductivity’ by Miguel Rivera-Torrente et al., Phys. Chem. Chem. Phys., 2019, 21, 25678–25689.

scholarly journals Dual-mode humidity detection using a lanthanide-based metal–organic framework: towards multifunctional humidity sensors

2017 ◽  
Vol 53 (32) ◽  
pp. 4465-4468 ◽  
Author(s):  
Yuan Gao ◽  
Pengtao Jing ◽  
Ning Yan ◽  
Michiel Hilbers ◽  
Hong Zhang ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Humidity Sensor ◽  
Metal Organic Framework ◽  
Dual Mode ◽  
Humidity Sensors ◽  
Highly Effective ◽  
Metal Organic ◽  
Spectroscopy Studies ◽  
Organic Framework

Combined photoluminescence and impedance spectroscopy studies show that a europium-based metal–organic framework behaves as a highly effective and reliable humidity sensor, enabling dual-mode humidity detection.

scholarly journals Switchable electrical conductivity in a three-dimensional metal–organic framework via reversible ligand n-doping

2020 ◽  
Vol 11 (5) ◽  
pp. 1342-1346 ◽  
Author(s):  
Hanna C. Wentz ◽  
Grigorii Skorupskii ◽  
Ana B. Bonfim ◽  
Jenna L. Mancuso ◽  
Christopher H. Hendon ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Redox Active Ligands ◽  
Redox Active ◽  
N Doping ◽  
Metal Organic ◽  
Organic Framework

Redox-active ligands are used to reversibly tune electrical conductivity in a porous 3D metal–organic framework (MOF).

Metal–organic-frameworks-derived NaTi2(PO4)3/carbon composites for efficient hybrid capacitive deionization

2019 ◽  
Vol 7 (19) ◽  
pp. 12126-12133 ◽  
Author(s):  
Kai Wang ◽  
Yong Liu ◽  
Zibiao Ding ◽  
Yuquan Li ◽  
Ting Lu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Porous Structure ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Carbon Composites ◽  
Capacitive Deionization ◽  
Metal Organic ◽  
Organic Framework

Metal–organic-framework-derived NaTi2(PO4)3/carbon composites with unique porous structure and improved electrical conductivity exhibit high desalination performance for hybrid capacitive deionization.

scholarly journals Raman spectroscopy studies of the terahertz vibrational modes of a DUT-8 (Ni) metal–organic framework

2017 ◽  
Vol 19 (47) ◽  
pp. 32099-32104 ◽  
Author(s):  
Alexander Krylov ◽  
Alexander Vtyurin ◽  
Petko Petkov ◽  
Irena Senkovska ◽  
Mariia Maliuta ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Metal Organic Framework ◽  
Low Frequency ◽  
Molecular Dynamic Simulations ◽  
Vibrational Modes ◽  
Dynamic Simulations ◽  
Metal Organic ◽  
Flexible Metal ◽  
Spectroscopy Studies ◽  
Organic Framework

Raman spectroscopy and Molecular Dynamic simulations were applied to study low-frequency vibrations of a flexible metal–organic framework DUT-8(Ni).

scholarly journals Single-Step Synthesis and Interface Tuning of Core–shell Metal–organic Framework Nanoparticles

2020 ◽  
Author(s):  
Kieran Orr ◽  
Sean M. Collins ◽  
Emily Reynolds ◽  
Frank Nightingale ◽  
Hanna Boström ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Metal Organic Framework ◽  
Single Step ◽  
Core Shell ◽  
Composition Gradient ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metal Organic ◽  
Distribution Of Components ◽  
Organic Framework

Control over the spatial distribution of components in metal–organic frameworks has potential to unlock improved performance and new behaviour in separations, sensing and catalysis. We report an unprecedented single-step synthesis of multi-component metal–organic framework (MOF) nanoparticles, which form with a core–shell structure whose internal interface can be systematically tuned. We use scanning transmission electron microscopy, X-ray energy dispersive spectroscopy and a new composition gradient model to fit high-resolution X-ray diffraction data to show how core–shell composition and interface characteristics are intricately controlled by synthesis temperature and reaction composition. Particle formation is investigated by in situ X-ray diffraction, which reveals that the spatial distribution of components evolves with time and is determined by the interplay of phase stability, crystallisation kinetics and diffusion. This work opens up new possibilities for the control and characterisation of functionality, component distribution and interfaces in MOF-based materials.

scholarly journals Cyclohexene Oxidation with H2O2 over Metal-Organic Framework MIL-125(Ti): The Effect of Protons on Reactivity

Catalysts ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 324 ◽  
Author(s):  
Nataliya Maksimchuk ◽  
Ji Lee ◽  
Artem Ayupov ◽  
Jong-San Chang ◽  
Oxana Kholdeeva
Keyword(s):  
Structural Changes ◽  
Metal Organic Framework ◽  
Catalytic Performance ◽  
Oxidation Products ◽  
Utilization Efficiency ◽  
Catalytic Oxidations ◽  
Before And After ◽  
Metal Organic ◽  
Spectroscopy Studies ◽  
Organic Framework

The catalytic performance of the titanium-based metal–organic framework MIL-125 was evaluated in the selective oxidation of cyclohexene (CyH) with environmentally friendly oxidants, H2O2 and tBuOOH. The catalytic activity of MIL-125 as well as the oxidant utilization efficiency and selectivity toward epoxide and epoxide-derived products can be greatly improved by acid additives (HClO4 or CF3SO3H). In the presence of 1 molar equivalent (relative to Ti) of a proton source, the total selectivity toward CyH epoxide and trans-cyclohexane-1,2-diol reached 75–80% at 38–43% alkene conversion after 45 min of reaction with 1 equivalent of 30% H2O2 at 50 °C. With 50% H2O2 as the oxidant, the total selectivity toward heterolytic oxidation products increased up to 92% at the same level of alkene conversion. N2 adsorption, powder X-ray diffraction (PXRD), and infrared (IR) spectroscopy studies before and after the catalytic oxidations confirmed the absence of structural changes in the Metal–organic framework (MOF) structure. MIL-125 was stable toward titanium leaching, behaved as a truly heterogeneous catalyst, and could easily be recovered and reused several times without any loss of the catalytic properties.

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