In situ growth and optical gas adsorption performance of Zn(ii) metal–organic framework membranes at room temperature

The Analyst ◽  
2019 ◽  
Vol 144 (16) ◽  
pp. 4887-4896 ◽  
Author(s):  
Mariyemu Tuergong ◽  
Patima Nizamidin ◽  
Abliz Yimit ◽  
Rena Simayi
Keyword(s):  
Room Temperature ◽  
Gas Adsorption ◽  
Uv Light ◽  
Metal Organic Framework ◽  
Adsorption Behaviors ◽  
Uv Light Irradiation ◽  
Unit Surface ◽  
Metal Organic ◽  
First Time

The optical gas adsorption behaviors of [Zn2(bdc)2(dpNDI)]n membranes were studied for the first time. Under UV light irradiation, they exhibited a greater adsorption response to xylene gas with adsorption capacity of 6.46 μg cm−2 per unit surface.

Synthesis, crystal structure, luminescence, and photocatalytic properties of a 2D Cu(II) metal-organic frameworks based on 3,5-di(1H-benzimidazol-1-yl)pyridine and 4,4′-oxybis(benzoate) ligands

2020 ◽  
Vol 75 (8) ◽  
pp. 727-732
Author(s):  
Chen Zhang ◽  
Jian-Qing Tao
Keyword(s):  
Crystal Structure ◽  
Thermal Analysis ◽  
Uv Light ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uv Light Irradiation ◽  
Photocatalytic Activities ◽  
Metal Organic

AbstractA new Cu(II) metal-organic framework, [Cu(L)(OBA)·H2O]n (1) [H2OBA = 4,4′-oxybis(benzoic acid), L = 3,5-di(1H-benzimidazol-1-yl)pyridine] was hydrothermally synthesized and characterized through IR spectroscopy, elemental and thermal analysis and single-crystal X-ray diffraction. Complex 1 is a four-connected uni-nodal 2D net with a (44·62) topology which shows an emission centered at λ ∼393 nm upon excitation at λ = 245 nm. Moreover, complex 1 possesses high photocatalytic activities for the decomposition of Rhodamine B (RhB) under UV light irradiation.

scholarly journals Charting the Complete Thermodynamic Landscape of Gas Adsorption for a Responsive Metal-Organic Framework

2021 ◽  
Author(s):  
Ruben Goeminne ◽  
Simon Krause ◽  
Stefan Kaskel ◽  
Toon Verstraelen ◽  
Jack D. Evans
Keyword(s):  
Gas Adsorption ◽  
Metal Organic Framework ◽  
Thermodynamic Description ◽  
Separation Processes ◽  
Metal Organic ◽  
Complex Landscape ◽  
Thermodynamic Driving Force ◽  
Free Energy Landscapes ◽  
First Time ◽  
Conformational Free Energy

<div>New nanoporous materials are able to revolutionize adsorption and separation processes. In particular, materials with adaptive cavities have high selectivity and may display previously undiscovered phenomena, such as negative gas adsorption (NGA), in which gas is released from the framework upon an increase in pressure. Although the thermodynamic driving force behind this and many other counterintuitive adsorption phenomena have been thoroughly investigated in recent years, several experimental observations remain difficult to explain. This necessitates a comprehensive analysis of gas adsorption akin to the conformational free energy landscapes used to understand the function of proteins. For the first time, we constructed the complete thermodynamic landscape of methane adsorption on DUT-49, a system that demonstrates NGA. Traversing this complex landscape correctly reproduces the experimentally observed structural transitions, the temperature dependence of the NGA phenomenon and the observed hysteresis between adsorption and desorption. The complete thermodynamic description presented here provides unparalleled insight into the process of adsorption and provides a framework to understand other adsorbents that challenge our preconceptions.<br></div>

scholarly journals Framework disorder and its effect on selective hysteretic sorption of a T-shaped azole-based metal–organic framework

IUCrJ ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 85-95 ◽  
Author(s):  
Sujuan Wang ◽  
Zhang-Wen Wei ◽  
Jianyong Zhang ◽  
Long Jiang ◽  
Dingxin Liu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Structural Disorder ◽  
Gas Sorption ◽  
Temperature Dependent ◽  
Disordered Structure ◽  
Metal Organic ◽  
First Time ◽  
Organic Framework

Metal–organic frameworks with highly ordered porosity have been studied extensively. In this paper, the effect of framework (pore) disorder on the gas sorption of azole-based isoreticular Cu(II) MOFs with rtl topology and characteristic 1D tubular pore channels is investigated for the first time. In contrast to other isoreticular rtl metal–organic frameworks, the Cu(II) metal–organic framework based on 5-(1H-imidazol-1-yl)isophthalate acid has a crystallographically identifiable disordered framework without open N-donor sites. The framework provides a unique example for investigating the effect of pore disorder on gas sorption that can be systematically evaluated. It exhibits remarkable temperature-dependent hysteretic CO2 sorption up to room temperature, and shows selectivity of CO2 over H2, CH4 and N2 at ambient temperature. The unique property of the framework is its disordered structure featuring distorted 1D tubular channels and DMF-guest-remediated defects. The results imply that structural disorder (defects) may play an important role in the modification of the performance of the material.

Silver nanoparticles prepared by gamma irradiation across metal–organic framework templates

RSC Advances ◽  
2015 ◽  
Vol 5 (14) ◽  
pp. 10707-10715 ◽  
Author(s):  
Li He ◽  
Ludovic F. Dumée ◽  
Dan Liu ◽  
Leonora Velleman ◽  
Fenghua She ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Gamma Irradiation ◽  
Room Temperature ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Single Step ◽  
Metal Organic ◽  
First Time ◽  
Organic Framework

In this study, we demonstrate for the first time the successful fabrication of well-dispersed ultrafine silver nanoparticles inside metal–organic frameworks through a single step gamma irradiation at room temperature.

scholarly journals Efficient One-Step Immobilization of CaLB Lipase over MOF Support NH2-MIL-53(Al)

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 918
Author(s):  
Victoria Gascón-Pérez ◽  
Mayra Belen Jiménez ◽  
Asunción Molina ◽  
Rosa María Blanco ◽  
Manuel Sánchez-Sánchez
Keyword(s):  
Room Temperature ◽  
Metal Organic Framework ◽  
The Other ◽  
Synthetic Method ◽  
Enzyme Loading ◽  
Synthesis Time ◽  
Ph Values ◽  
Metal Organic ◽  
One Step

Metal-organic framework (MOF) materials possess the widest versatility in structure, composition, and synthesis procedures amongst the known families of materials. On the other hand, the extraordinary affinity between MOFs and enzymes has led to widely investigating these materials as platforms to support these catalytic proteins in recent years. In this work, the MOF material NH2-MIL-53(Al) has been tested as a support to immobilize by one-step methodology (in situ) the enzyme lipase CaLB from Candida antarctica by employing conditions that are compatible with its enzymatic activity (room temperature, aqueous solution, and moderate pH values). Once the nature of the linker deprotonating agent or the synthesis time were optimized, the MOF material resulted in quite efficient entrapping of the lipase CaLB through this in situ approach (>85% of the present enzyme in the synthesis media) while the supported enzyme retained acceptable activity (29% compared to the free enzyme) and had scarce enzyme leaching. The equivalent post-synthetic method led to biocatalysts with lower enzyme loading values. These results make clear that the formation of MOF support in the presence of the enzyme to be immobilized substantially improves the efficiency of the biocatalysts support for retaining the enzyme and limits their leaching.

In situ spectroscopy studies of CO2 adsorption in a dually functionalized microporous metal–organic framework

2015 ◽  
Vol 3 (9) ◽  
pp. 4945-4953 ◽  
Author(s):  
Yuan Chen ◽  
Hao Wang ◽  
Jing Li ◽  
Jenny V. Lockard
Keyword(s):  
Gas Adsorption ◽  
Molecular Level ◽  
Metal Organic Framework ◽  
Spectroscopic Characterization ◽  
Characterization Methods ◽  
Adsorption Processes ◽  
Metal Organic ◽  
Spectroscopy Studies ◽  
Organic Framework

The activation and CO2 gas adsorption processes in the rht-type metal-organic framework, [Cu3(TDPAT) (H2O)3]·10H2O·5DMA (TDPAT = 2,4,6-tris(3,5-dicarboxylphenylamino)-1,3,5-triazine) were investigated on the molecular level using several spectroscopic characterization methods.

An anionic metal–organic framework based on angular tetracarboxylic acid and a mononuclear copper ion for selective gas adsorption

2016 ◽  
Vol 3 (11) ◽  
pp. 1411-1418 ◽  
Author(s):  
Jingjing Jiao ◽  
Huimin Liu ◽  
Fengli Chen ◽  
Dongjie Bai ◽  
Shunshun Xiong ◽  
...  
Keyword(s):  
Topological Structure ◽  
Room Temperature ◽  
Gas Adsorption ◽  
Selective Adsorption ◽  
Metal Organic Framework ◽  
Copper Ion ◽  
Tetracarboxylic Acid ◽  
Metal Organic ◽  
Organic Framework

A rare example of a MOF, ZJNU-55, based on mononuclear Cu(COO)4 and an angular diisophthalate linker with a novel topological structure exhibiting selective adsorption of C2H2 and CO2 from CH4 at room temperature was presented.

scholarly journals Charting the Complete Thermodynamic Landscape of Gas Adsorption for a Responsive Metal-Organic Framework

2021 ◽  
Author(s):  
Ruben Goeminne ◽  
Simon Krause ◽  
Stefan Kaskel ◽  
Toon Verstraelen ◽  
Jack D. Evans
Keyword(s):  
Gas Adsorption ◽  
Metal Organic Framework ◽  
Thermodynamic Description ◽  
Separation Processes ◽  
Metal Organic ◽  
Complex Landscape ◽  
Thermodynamic Driving Force ◽  
Free Energy Landscapes ◽  
First Time ◽  
Conformational Free Energy

<div>New nanoporous materials are able to revolutionize adsorption and separation processes. In particular, materials with adaptive cavities have high selectivity and may display previously undiscovered phenomena, such as negative gas adsorption (NGA), in which gas is released from the framework upon an increase in pressure. Although the thermodynamic driving force behind this and many other counterintuitive adsorption phenomena have been thoroughly investigated in recent years, several experimental observations remain difficult to explain. This necessitates a comprehensive analysis of gas adsorption akin to the conformational free energy landscapes used to understand the function of proteins. For the first time, we constructed the complete thermodynamic landscape of methane adsorption on DUT-49, a system that demonstrates NGA. Traversing this complex landscape correctly reproduces the experimentally observed structural transitions, the temperature dependence of the NGA phenomenon and the observed hysteresis between adsorption and desorption. The complete thermodynamic description presented here provides unparalleled insight into the process of adsorption and provides a framework to understand other adsorbents that challenge our preconceptions.<br></div>

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