scholarly journals Adaptive Response of a Metal–organic Framework Through Reversible Disorder–disorder Transitions

2020 ◽  
Author(s):  
Sebastian Ehrling ◽  
Emily M. Reynolds ◽  
Volodymyr Bon ◽  
Irena Senkovska ◽  
Tatiana E. Gorelik ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Porous Metal ◽  
Transformation Mechanism ◽  
Guest Molecules ◽  
Closed Loops ◽  
University Of Technology ◽  
Singular Transformation ◽  
Metal Organic ◽  
Local Symmetries ◽  
Organic Framework

A highly porous metal-organic framework (DUT-8(Ni), DUT = Dresden University of Technology) is found to adopt a configurationally-degenerate family of disordered states that respond adaptively to specific guest stimuli. This disorder originates from non-linear carboxylate linkers arranging paddlewheels in closed loops of different local symmetries that in turn propagate as tilings of characteristic complex superstructures. Solvent exchange stimulates the formation of distinct disordered superstructures for specific guest molecules. Electron diffraction by desolvated DUT-8(Ni) nanoparticles demonstrates these superstructures to persist on the nanodomain level. Remarkably, guest exchange stimulates reversible and repeatable switching transitions between distinct disorder states. Deuterium NMR spectroscopy and in situ PXRD studies identify the transformation mechanism as an adaptive singular transformation event.<br>

scholarly journals Adaptive Response of a Metal–organic Framework Through Reversible Disorder–disorder Transitions

2020 ◽  
Author(s):  
Sebastian Ehrling ◽  
Emily M. Reynolds ◽  
Volodymyr Bon ◽  
Irena Senkovska ◽  
Tatiana E. Gorelik ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Porous Metal ◽  
Transformation Mechanism ◽  
Guest Molecules ◽  
Closed Loops ◽  
University Of Technology ◽  
Singular Transformation ◽  
Metal Organic ◽  
Local Symmetries ◽  
Organic Framework

A highly porous metal-organic framework (DUT-8(Ni), DUT = Dresden University of Technology) is found to adopt a configurationally-degenerate family of disordered states that respond adaptively to specific guest stimuli. This disorder originates from non-linear carboxylate linkers arranging paddlewheels in closed loops of different local symmetries that in turn propagate as tilings of characteristic complex superstructures. Solvent exchange stimulates the formation of distinct disordered superstructures for specific guest molecules. Electron diffraction by desolvated DUT-8(Ni) nanoparticles demonstrates these superstructures to persist on the nanodomain level. Remarkably, guest exchange stimulates reversible and repeatable switching transitions between distinct disorder states. Deuterium NMR spectroscopy and in situ PXRD studies identify the transformation mechanism as an adaptive singular transformation event.<br>

Nickel(ii)–azido ferromagnetic chains in a 3D porous metal–organic framework with breathing guest molecules

2008 ◽  
pp. 5556 ◽  
Author(s):  
Bo-Wen Hu ◽  
Jiong-Peng Zhao ◽  
E. C. Sañudo ◽  
Fu-Chen Liu ◽  
Yong-Fei Zeng ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Porous Metal ◽  
Guest Molecules ◽  
Metal Organic ◽  
Organic Framework

Synthesis and Structure of a Clathrated Two-Dimensional Metal-Organic Framework: [Cd(4,4'-bpy)2(H2O)2](ClO4)2·(L)2·H2O (L = Bis(1-pyrazinylethylidene)hydrazine)

2008 ◽  
Vol 73 (1) ◽  
pp. 24-31
Author(s):  
Dayu Wu ◽  
Genhua Wu ◽  
Wei Huang ◽  
Zhuqing Wang
Keyword(s):  
Metal Organic Framework ◽  
Channel Structure ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Guest Molecules ◽  
X Ray ◽  
Square Planar ◽  
Metal Organic ◽  
Aqueous Meoh ◽  
Organic Framework

The compound [Cd(4,4'-bpy)2(H2O)2](ClO4)2·(L)2 was obtained by the reaction of Cd(ClO4)2, bis(1-pyrazinylethylidene)hydrazine (L) and 4,4'-bipyridine in aqueous MeOH. Single-crystal X-ray diffraction has revealed its two-dimensional metal-organic framework. The 2-D layers superpose on each other, giving a channel structure. The square planar grids consist of two pairs of shared edges with Cd(II) ion and a 4,4'-bipyridine molecule each vertex and side, respectively. The square cavity has a dimension of 11.817 × 11.781 Å. Two guest molecules of bis(1-pyrazinylethylidene)hydrazine are clathrated in every hydrophobic host cavity, being further stabilized by π-π stacking and hydrogen bonding. The results suggest that the hydrazine molecules present in the network serve as structure-directing templates in the formation of crystal structures.

Multifunctionality in an Ion-Exchanged Porous Metal–Organic Framework

2021 ◽  
Vol 143 (3) ◽  
pp. 1365-1376
Author(s):  
Sérgio M. F. Vilela ◽  
Jorge A. R. Navarro ◽  
Paula Barbosa ◽  
Ricardo F. Mendes ◽  
Germán Pérez-Sánchez ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Porous Metal ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Metal-Organic Framework-Based Stimuli-Responsive Polymers

2021 ◽  
Vol 5 (4) ◽  
pp. 101
Author(s):  
Menglian Wei ◽  
Yu Wan ◽  
Xueji Zhang
Keyword(s):  
Metal Organic Framework ◽  
Chemical Properties ◽  
Stimuli Responsive ◽  
Guest Molecules ◽  
Stimuli Responsive Polymers ◽  
Responsive Polymers ◽  
Reversible Phase Transition ◽  
Metal Organic ◽  
External Stimuli ◽  
Organic Framework

Metal-organic framework (MOF) based stimuli-responsive polymers (coordination polymers) exhibit reversible phase-transition behavior and demonstrate attractive properties that are capable of altering physical and/or chemical properties upon exposure to external stimuli, including pH, temperature, ions, etc., in a dynamic fashion. Thus, their conformational change can be imitated by the adsorption/desorption of target analytes (guest molecules), temperature or pressure changes, and electromagnetic field manipulation. MOF-based stimuli responsive polymers have received great attention due to their advanced optical properties and variety of applications. Herein, we summarized some recent progress on MOF-based stimuli-responsive polymers (SRPs) classified by physical and chemical responsiveness, including temperature, pressure, electricity, pH, metal ions, gases, alcohol and multi-targets.

Unusual pore structure and sorption behaviour in a hexanodal zinc–organic framework material

2014 ◽  
Vol 50 (14) ◽  
pp. 1678-1681 ◽  
Author(s):  
Jinjie Qian ◽  
Feilong Jiang ◽  
Linjie Zhang ◽  
Kongzhao Su ◽  
Jie Pan ◽  
...  
Keyword(s):  
Pore Structure ◽  
Metal Organic Framework ◽  
Porous Metal ◽  
Sorption Behaviour ◽  
Metal Organic ◽  
Highly Porous ◽  
Organic Framework

A highly porous metal–organic framework structurally consists of three topological kinds of 3-connected 1,3,5-benzenetricarboxylate ligands, Zn2(COO)4, Zn3O(COO)6 and Zn4O(COO)6 SBUs, featuring a new 3,3,3,4,4,6-c hexanodal topology.

High-Throughput Aided Synthesis of the Porous Metal−Organic Framework-Type Aluminum Pyromellitate, MIL-121, with Extra Carboxylic Acid Functionalization

2010 ◽  
Vol 49 (21) ◽  
pp. 9852-9862 ◽  
Author(s):  
Christophe Volkringer ◽  
Thierry Loiseau ◽  
Nathalie Guillou ◽  
Gérard Férey ◽  
Mohamed Haouas ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
High Throughput ◽  
Metal Organic Framework ◽  
Porous Metal ◽  
Metal Organic ◽  
Organic Framework

A Solar Assistant Dehumidifier Based on Porous Metal-Organic Framework

2021 ◽  
Vol 896 ◽  
pp. 13-20
Author(s):  
Xiao Yu Wen
Keyword(s):  
Metal Organic Framework ◽  
Porous Metal ◽  
Modern Architecture ◽  
Activated Alumina ◽  
Additional Energy ◽  
Humidity Control ◽  
Energy Inputs ◽  
Metal Organic ◽  
High Regeneration ◽  
Organic Framework

As an important factor to measure environmental comfort, humidity control is very important. However, previous dehumidification methods have many defects, such as condensation and adsorbents, which often require a lot of energy. The growing requirements of an indoor environment can stem from the development of living levels and technology. Humidity, as an important factor to measure environmental comfort, affects living and production, and indoor humidity control is an indispensable part of modern architecture. However, there are many defects in the previous dehumidification methods, such as condensation dehumidification, which often requires a lot of energy. Traditional adsorbents (such as zeolite silica and activated alumina) have problems with fragile structures or high regeneration temperatures. In this paper, an indoor dehumidification device based on the porous metal-organic framework {MOF-801, Zr6O4(OH)4(Fumarate)6}, can realize the indoor dehumidification process only by using a small amount of solar energy (1 kilowatt per square meter). The device is expected to remove 0.2113 kg/h of moisture per square meter MOF-801, only needs a few additional energy inputs.

Sign in / Sign up

Export Citation Format

Share Document