Nanorods of a novel highly conductive 2D metal–organic framework based on perthiolated coronene for thermoelectric conversion

2020 ◽  
Vol 8 (24) ◽  
pp. 8199-8205
Author(s):  
Zhijun Chen ◽  
Yutao Cui ◽  
Yigang Jin ◽  
Liyao Liu ◽  
Jie Yan ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Thermoelectric Performance ◽  
Thermoelectric Conversion ◽  
Metal Organic ◽  
P Type ◽  
Organic Framework

Ni-PTC, a perthiolated coronene-based conducting MOF displays p-type thermoelectric performance with a ZT value of 0.003 at 300 K.

A p-type Ti(iv)-based metal–organic framework with visible-light photo-response

2014 ◽  
Vol 50 (29) ◽  
pp. 3786-3788 ◽  
Author(s):  
Junkuo Gao ◽  
Jianwei Miao ◽  
Pei-Zhou Li ◽  
Wen Yuan Teng ◽  
Ling Yang ◽  
...  
Keyword(s):  
Visible Light ◽  
Metal Organic Framework ◽  
Porous Metal ◽  
Type Semiconductor ◽  
Visible Light Driven ◽  
Metal Organic ◽  
Photo Response ◽  
P Type ◽  
Photoelectrochemical Studies ◽  
Organic Framework

Photoelectrochemical studies on a new Ti(iv)-based porous metal–organic framework (NTU-9, bandgap 1.72 eV) indicated that NTU-9 is a p-type semiconductor with visible-light-driven photoactivity.

scholarly journals Enhancing Photovoltages at p-Type Semiconductors Through a Redox-active Metal-Organic Framework Surface Coating

2020 ◽  
Author(s):  
Anna Beiler ◽  
Brian McCarthy ◽  
Ben A Johnson ◽  
Sascha Ott
Keyword(s):  
Metal Organic Framework ◽  
Three Dimensions ◽  
Naphthalene Diimide ◽  
Thermodynamic Potentials ◽  
Novel Approach ◽  
Apparent Diffusion ◽  
Metal Organic ◽  
Conductive Substrates ◽  
P Type ◽  
Organic Framework

<p>Metal-organic frameworks (MOFs) interfaced with visible-light-absorbing semiconductors offer a novel approach to improve photoelectrochemical performances. When tested under 1-sun illumination, a naphthalene diimide (NDI)-based monolayer immobilized at p-type Si(111) undergoes two sequential one-electron reductions close to their thermodynamic potentials. No photovoltage is observed until the NDI monolayer is expanded in three dimensions in a PIZOF-type Zr(NDI) MOF (PIZOF = porous interpenetrated zirconium organic framework). The surface-grown MOF thin film promotes photo-induced charge separation and electron transfer across the interface and through the film, resulting in reduction of the molecular linkers at formal potentials >300 mV positive of their thermodynamic potentials. The apparent diffusion coefficient is similar to that measured at a conductive electrode (10<sup>-10</sup> cm<sup>2</sup> s<sup>-1</sup>), indicating that the observed photocurrent is governed by charge diffusion through the Zr(NDI) MOF film. The charges accumulated in the NDI-based MOF can be extracted by an external electron acceptor, demonstrating sufficient conductivity throughout the MOF film to power reductive transformations. When grown on GaP(100), the potentials of the NDI reductions in the MOF film are shifted anodically by >700 mV compared to those of the same MOF on conductive substrates. This photovoltage, among the highest reported for GaP in photoelectrochemical applications, illustrates the power of MOF thin films to improve photocathodic performance. </p>

A p-Type Zinc-Based Metal–Organic Framework

2017 ◽  
Vol 56 (11) ◽  
pp. 6208-6213 ◽  
Author(s):  
Congcong Shang ◽  
Romain Gautier ◽  
Tengfei Jiang ◽  
Eric Faulques ◽  
Camille Latouche ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic ◽  
P Type ◽  
Organic Framework

Signature of p-type semiconductor features in paper-based back gate metal-organic framework thin-film transistors

2020 ◽  
Vol 117 (9) ◽  
pp. 093303
Author(s):  
Zhi Jiang ◽  
Desheng Liu ◽  
Caihong Li ◽  
Hezhuang Liu ◽  
Jihua Zou ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Metal Organic Framework ◽  
Back Gate ◽  
Type Semiconductor ◽  
Metal Organic ◽  
P Type ◽  
Organic Framework

Boosting thermoelectric performance by in situ growth of metal organic framework on carbon nanotube and subsequent annealing

Carbon ◽  
2020 ◽  
Vol 157 ◽  
pp. 324-329 ◽  
Author(s):  
Yufeng Xue ◽  
Zongbo Zhang ◽  
Yichuan Zhang ◽  
Xin Wang ◽  
Liangliang Li ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Metal Organic Framework ◽  
Subsequent Annealing ◽  
Thermoelectric Performance ◽  
In Situ Growth ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Enhancing Photovoltages at p-Type Semiconductors Through a Redox-active Metal-Organic Framework Surface Coating

2020 ◽  
Author(s):  
Anna Beiler ◽  
Brian McCarthy ◽  
Ben A Johnson ◽  
Sascha Ott
Keyword(s):  
Metal Organic Framework ◽  
Three Dimensions ◽  
Naphthalene Diimide ◽  
Thermodynamic Potentials ◽  
Novel Approach ◽  
Apparent Diffusion ◽  
Metal Organic ◽  
Conductive Substrates ◽  
P Type ◽  
Organic Framework

<p>Metal-organic frameworks (MOFs) interfaced with visible-light-absorbing semiconductors offer a novel approach to improve photoelectrochemical performances. When tested under 1-sun illumination, a naphthalene diimide (NDI)-based monolayer immobilized at p-type Si(111) undergoes two sequential one-electron reductions close to their thermodynamic potentials. No photovoltage is observed until the NDI monolayer is expanded in three dimensions in a PIZOF-type Zr(NDI) MOF (PIZOF = porous interpenetrated zirconium organic framework). The surface-grown MOF thin film promotes photo-induced charge separation and electron transfer across the interface and through the film, resulting in reduction of the molecular linkers at formal potentials >300 mV positive of their thermodynamic potentials. The apparent diffusion coefficient is similar to that measured at a conductive electrode (10<sup>-10</sup> cm<sup>2</sup> s<sup>-1</sup>), indicating that the observed photocurrent is governed by charge diffusion through the Zr(NDI) MOF film. The charges accumulated in the NDI-based MOF can be extracted by an external electron acceptor, demonstrating sufficient conductivity throughout the MOF film to power reductive transformations. When grown on GaP(100), the potentials of the NDI reductions in the MOF film are shifted anodically by >700 mV compared to those of the same MOF on conductive substrates. This photovoltage, among the highest reported for GaP in photoelectrochemical applications, illustrates the power of MOF thin films to improve photocathodic performance. </p>

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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