scholarly journals Precise Control of Molecular Self‐Diffusion in Isoreticular and Multivariate Metal‐Organic Frameworks

ChemPhysChem ◽  
2019 ◽  
Vol 21 (1) ◽  
pp. 32-35 ◽  
Author(s):  
Thomas M. Osborn Popp ◽  
Ariel Z. Plantz ◽  
Omar M. Yaghi ◽  
Jeffrey A. Reimer
Keyword(s):  
Metal Organic Frameworks ◽  
Precise Control ◽  
Self Diffusion ◽  
Metal Organic

scholarly journals Precise control of pore hydrophilicity enabled by post-synthetic cation exchange in metal–organic frameworks

2018 ◽  
Vol 9 (15) ◽  
pp. 3856-3859 ◽  
Author(s):  
Ashley M. Wright ◽  
Adam J. Rieth ◽  
Sungwoo Yang ◽  
Evelyn N. Wang ◽  
Mircea Dincă
Keyword(s):  
Relative Humidity ◽  
Cation Exchange ◽  
Water Uptake ◽  
Metal Organic Frameworks ◽  
Precise Control ◽  
Metal Organic

The ability to control the relative humidity at which water uptake occurs in a given adsorbent is advantageous, making that material applicable to a variety of different applications.

scholarly journals Influence of Pore Size on Carbon Dioxide Diffusion in Two Isoreticular Metal–Organic Frameworks

2020 ◽  
Author(s):  
Alexander C. Forse ◽  
Kristen A. Colwell ◽  
Miguel I. Gonzalez ◽  
Stefan Benders ◽  
Rodolfo M. Torres-Gavosto ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Porous Materials ◽  
Pore Size ◽  
Critical Role ◽  
Metal Organic Frameworks ◽  
The Self ◽  
Self Diffusion ◽  
Common Strategy ◽  
Metal Organic ◽  
Different Diameters

The rapid diffusion of molecules in porous materials is critical for numerous applications including separations, energy storage, sensing, and catalysis. A common strategy for tuning guest diffusion rates is to vary the material pore size, although detailed studies that isolate the effect of changing this particular variable are lacking. Here, we begin to address this challenge by measuring the diffusion of carbon dioxide in two isoreticular metal–organic frameworks featuring channels with different diameters, Zn<sub>2</sub>(dobdc) (dobdc<sup>4–</sup> = 2,5-dioxidobenzene-1,4-dicarboxylate) and Zn<sub>2</sub>(dobpdc) (dobpdc<sup>4−</sup> = 4,4′-dioxidobiphenyl-3,3′-dicarboxylate), using pulsed field gradient NMR spectroscopy. An increase in the pore diameter from 15 Å in Zn<sub>2</sub>(dobdc) to 22 Å in Zn<sub>2</sub>(dobpdc) is accompanied by an increase in the self-diffusion of CO<sub>2</sub> by a factor of 4 to 6, depending on the gas pressure. Analysis of the diffusion anisotropy in Zn<sub>2</sub>(dobdc) reveals that the self-diffusion coefficient for motion of CO<sub>2</sub> along the framework channels is at least 10,000 times greater than for motion between the framework channels. Our findings should aid the design of improved porous materials for a range of applications where diffusion plays a critical role in determining performance.

scholarly journals Precise Control of Cu Nanoparticle Size and Catalytic Activity through Pore Templating in Zr Metal–Organic Frameworks

2020 ◽  
Vol 32 (7) ◽  
pp. 3078-3086 ◽  
Author(s):  
Mohammad Rasel Mian ◽  
Louis R. Redfern ◽  
Saied Md Pratik ◽  
Debmalya Ray ◽  
Jian Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Organic Frameworks ◽  
Nanoparticle Size ◽  
Precise Control ◽  
Metal Organic ◽  
Cu Nanoparticle

scholarly journals Influence of Pore Size on Carbon Dioxide Diffusion in Two Isoreticular Metal–Organic Frameworks

2020 ◽  
Author(s):  
Alexander C. Forse ◽  
Kristen A. Colwell ◽  
Miguel I. Gonzalez ◽  
Stefan Benders ◽  
Rodolfo M. Torres-Gavosto ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Porous Materials ◽  
Pore Size ◽  
Critical Role ◽  
Metal Organic Frameworks ◽  
The Self ◽  
Self Diffusion ◽  
Common Strategy ◽  
Metal Organic ◽  
Different Diameters

The rapid diffusion of molecules in porous materials is critical for numerous applications including separations, energy storage, sensing, and catalysis. A common strategy for tuning guest diffusion rates is to vary the material pore size, although detailed studies that isolate the effect of changing this particular variable are lacking. Here, we begin to address this challenge by measuring the diffusion of carbon dioxide in two isoreticular metal–organic frameworks featuring channels with different diameters, Zn<sub>2</sub>(dobdc) (dobdc<sup>4–</sup> = 2,5-dioxidobenzene-1,4-dicarboxylate) and Zn<sub>2</sub>(dobpdc) (dobpdc<sup>4−</sup> = 4,4′-dioxidobiphenyl-3,3′-dicarboxylate), using pulsed field gradient NMR spectroscopy. An increase in the pore diameter from 15 Å in Zn<sub>2</sub>(dobdc) to 22 Å in Zn<sub>2</sub>(dobpdc) is accompanied by an increase in the self-diffusion of CO<sub>2</sub> by a factor of 4 to 6, depending on the gas pressure. Analysis of the diffusion anisotropy in Zn<sub>2</sub>(dobdc) reveals that the self-diffusion coefficient for motion of CO<sub>2</sub> along the framework channels is at least 10,000 times greater than for motion between the framework channels. Our findings should aid the design of improved porous materials for a range of applications where diffusion plays a critical role in determining performance.

scholarly journals Influence of Pore Size on Carbon Dioxide Diffusion in Two Isoreticular Metal–Organic Frameworks

2020 ◽  
Author(s):  
Alexander C. Forse ◽  
Kristen A. Colwell ◽  
Miguel I. Gonzalez ◽  
Stefan Benders ◽  
Rodolfo M. Torres-Gavosto ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Porous Materials ◽  
Pore Size ◽  
Critical Role ◽  
Metal Organic Frameworks ◽  
The Self ◽  
Self Diffusion ◽  
Common Strategy ◽  
Metal Organic ◽  
Different Diameters

The rapid diffusion of molecules in porous materials is critical for numerous applications including separations, energy storage, sensing, and catalysis. A common strategy for tuning guest diffusion rates is to vary the material pore size, although detailed studies that isolate the effect of changing this particular variable are lacking. Here, we begin to address this challenge by measuring the diffusion of carbon dioxide in two isoreticular metal–organic frameworks featuring channels with different diameters, Zn<sub>2</sub>(dobdc) (dobdc<sup>4–</sup> = 2,5-dioxidobenzene-1,4-dicarboxylate) and Zn<sub>2</sub>(dobpdc) (dobpdc<sup>4−</sup> = 4,4′-dioxidobiphenyl-3,3′-dicarboxylate), using pulsed field gradient NMR spectroscopy. An increase in the pore diameter from 15 Å in Zn<sub>2</sub>(dobdc) to 22 Å in Zn<sub>2</sub>(dobpdc) is accompanied by an increase in the self-diffusion of CO<sub>2</sub> by a factor of 4 to 6, depending on the gas pressure. Analysis of the diffusion anisotropy in Zn<sub>2</sub>(dobdc) reveals that the self-diffusion coefficient for motion of CO<sub>2</sub> along the framework channels is at least 10,000 times greater than for motion between the framework channels. Our findings should aid the design of improved porous materials for a range of applications where diffusion plays a critical role in determining performance.

POLYMERIZATION WITHIN CONFINED NANOCHANNELS OF POROUS METAL-ORGANIC FRAMEWORKS

2013 ◽  
Vol 01 (02) ◽  
pp. 1330001 ◽  
Author(s):  
ZHIGANG HU ◽  
DAN ZHAO
Keyword(s):  
Molecular Weight ◽  
Ring Opening ◽  
Recent Progress ◽  
Metal Organic Frameworks ◽  
Flexible Structures ◽  
Porous Metal ◽  
Ring Opening Polymerization ◽  
Coordination Polymerization ◽  
Precise Control ◽  
Metal Organic

Metal-organic frameworks (MOFs) have been increasingly investigated as templates for precise control of polymerization. Polymerizations within confined nanochannels of porous MOFs have shown unique confinement and alignment effect on polymer chain structures and thus are promising ways to achieve well-defined polymers. Herein, this review will focus on illustrating the recent progress of polymerization within confined nanochannels of MOFs, including radical polymerization, coordination polymerization, ring-opening polymerization, catalytic polymerization, etc. It will demonstrate how the heterogeneous MOF structures (pore size, pore shapes, flexible structures, and versatile functional groups) affect the polymeric products' molecular weight, molecular weight distribution, tacticity, reaction sites, copolymer sequence, etc. Meanwhile, we will highlight some challenges and foreseeable prospects on these novel polymerization methods.

Metal-Organic Frameworks

2021 ◽  
Author(s):  
Lars Öhrström ◽  
Francoise M. Amombo Noa
Keyword(s):  
Metal Organic Frameworks ◽  
Metal Organic
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