scholarly journals Novel hypophosphite hybrid perovskites of [CH3NH2NH2][Mn(H2POO)3] and [CH3NH2NH2][Mn(H2POO)2.83(HCOO)0.17] exhibiting antiferromagnetic order and red photoluminescence

RSC Advances ◽  
2020 ◽  
Vol 10 (32) ◽  
pp. 19020-19026 ◽  
Author(s):  
Mirosław Mączka ◽  
Anna Gągor ◽  
Adam Pikul ◽  
Dagmara Stefańska
Keyword(s):  
Metal Organic Framework ◽  
Antiferromagnetic Order ◽  
Red Emission ◽  
Metal Organic ◽  
Perovskite Type ◽  
Organic Framework

The first perovskite-type hypophosphite-linked dense metal–organic framework exhibiting red emission and antiferromagnetic order at 6.5 K.

The structural, phonon and optical properties of [CH3NH3]M0.5CrxAl0.5−x(HCOO)3 (M = Na, K; x = 0, 0.025, 0.5) metal–organic framework perovskites for luminescence thermometry

2019 ◽  
Vol 21 (15) ◽  
pp. 7965-7972 ◽  
Author(s):  
Maciej Ptak ◽  
Błażej Dziuk ◽  
Dagmara Stefańska ◽  
Krzysztof Hermanowicz
Keyword(s):  
Optical Properties ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Perovskite Type ◽  
Organic Framework ◽  
Luminescence Thermometry

We report the structural, phonon and optical properties of perovskite-type heterometallic formates templated by methylammonium cations.

A novel luminescence phosphor of metal-organic framework with orange-red emission

2021 ◽  
Author(s):  
Wei Meng ◽  
Lin Sun ◽  
Yuhao Long ◽  
Qianping Wang ◽  
Lian Zhou ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Metal Organic Framework ◽  
Pyridine Derivative ◽  
Red Emission ◽  
Metal Organic ◽  
Organic Framework

A novel metal-organic framework was rationally designed and successfully constructed using carboxylic acid and pyridine derivative as bilinkers. The 2-fold interpenetration structure is advantageous to stabilize the skeleton up to...

Enhancement of the guest orderliness in a low-symmetric perovskite-type metal–organic framework influenced by Jahn–Teller distortion

2018 ◽  
Vol 20 (34) ◽  
pp. 21809-21813 ◽  
Author(s):  
M. Viswanathan
Keyword(s):  
Neutron Diffraction ◽  
Single Crystal ◽  
Metal Organic Framework ◽  
Teller Distortion ◽  
Unusual Effect ◽  
Jahn Teller ◽  
Metal Organic ◽  
Jahn Teller Distortion ◽  
Perovskite Type ◽  
Organic Framework

Single-crystal neutron diffraction reveals an enhancement of the guest-orderliness in a low-symmetric MOF, with an opposite scenario for its high-symmetric cousin. The mechanism behind this unusual effect is proposed.

Unusual isosymmetric order–disorder phase transition in a new perovskite-type dimethylhydrazinium manganese formate exhibiting weak ferromagnetism and photoluminescence properties

2021 ◽  
Author(s):  
Jan Albert Zienkiewicz ◽  
Dorota Anna Kowalska ◽  
Katarzyna Fedoruk ◽  
Mariusz Stefanski ◽  
Adam Pikul ◽  
...  
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Steric Hindrance ◽  
Metal Organic Framework ◽  
Weak Ferromagnetism ◽  
Photoluminescence Properties ◽  
Disorder Phase Transition ◽  
Metal Organic ◽  
Perovskite Type ◽  
Organic Framework

We report the synthesis, thermal, structural, dielectric, magnetic and optical properties of a novel metal–organic framework templated by the large 1,1-dimethylhydrazinium cation. We analyse the steric hindrance-related properties.

scholarly journals Heterometallic perovskite-type metal–organic framework with an ammonium cation: structure, phonons, and optical response of [NH4]Na0.5CrxAl0.5−x(HCOO)3 (x = 0, 0.025 and 0.5)

2018 ◽  
Vol 20 (34) ◽  
pp. 22284-22295 ◽  
Author(s):  
Maciej Ptak ◽  
Dagmara Stefańska ◽  
Anna Gągor ◽  
Katrine L. Svane ◽  
Aron Walsh ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Metal Organic Framework ◽  
Emission Spectra ◽  
Optical Response ◽  
Ammonium Cation ◽  
Metal Organic ◽  
Perovskite Type ◽  
Organic Framework

We report the synthesis, crystal structure, dielectric, vibrational and emission spectra of heterometallic perovskite-type AmNaCr and AmNaAl MOFs.

Thermal conductivity of a perovskite-type metal–organic framework crystal

2017 ◽  
Vol 46 (39) ◽  
pp. 13342-13344 ◽  
Author(s):  
Wilarachchige D. C. B. Gunatilleke ◽  
Kaya Wei ◽  
Zheng Niu ◽  
Lukasz Wojtas ◽  
George Nolas ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
First Time ◽  
Perovskite Type ◽  
Organic Framework

The thermal conductivity of a perovskite-type MOF crystal has been investigated for the first time.

scholarly journals Mechanical and optical properties of ultralarge flakes of a metal–organic framework with molecular thickness

2015 ◽  
Vol 6 (4) ◽  
pp. 2553-2558 ◽  
Author(s):  
Cristina Hermosa ◽  
Benjamin R. Horrocks ◽  
José I. Martínez ◽  
Fabiola Liscio ◽  
Julio Gómez-Herrero ◽  
...  
Keyword(s):  
Optical Properties ◽  
Metal Organic Framework ◽  
Free Standing ◽  
Red Emission ◽  
Metal Organic ◽  
Organic Framework

The red emission on isolated 2d-mof flakes with areas of square microns and molecular thicknesses (from single up to ca. 50 layers) has been characterized. Free-standing flakes have also been produced and their mechanical and optical properties studied.

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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