Control of pore environment in nickel-based metal-organic frameworks for SF6/N2 separation

Liu, Haoran; Wang, Shaomin; Dong, Yong-Li; Zheng, Su‐Tao; Ni, Shuang; Xu, Jie; Yang, Qingyuan

doi:10.1016/j.cjsc.2023.100022

“…Among them, PAF-2F, prepared from monomers containing only one fluorine atom, exhibited a higher adsorption efficiency than PAF-2,4diF (77.2%, 273 K) and PAF-4,4diF (21.5%, 298 K), which contain two fluorine atoms. This indicates that the fluorine content is not the primary determining factor for the SF 6 /N 2 separation efficiency, and the pore structure of PAF materials may play a more important role. ,− ,− …”

Section: Resultsmentioning

confidence: 99%

Fluorine Incorporation for Enhanced Gas Separation Performance in Porous Organic Polymers: Investigating Reaction Pathways and Pore Structure Control

Meng,

Liu,

Peng

et al. 2024

ACS Appl. Mater. Interfaces

2

0

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The precise control of pore structures in porous organic polymer (POP) materials is of paramount importance in addressing a wide range of challenges associated with gas separation processes. In this study, we present a novel approach to optimize the gas separation performance of POPs through the introduction of fluorine groups and figure out an important factor of reaction decision that whether the AlCl 3 -catalyzed polymerization is Scholl reaction or Friedel−Crafts alkylation. In the chloroform system, the steric hindrance of function groups could make direct coupling between the benzene rings difficult, which would lead to part solvent knitting (Friedel−Crafts alkylation) instead. The fluorinated polymers show enhanced surface area and pore size characteristics. Notably, the fluorinated polymers exhibited significantly improved adsorption and separation performance for SF 6 , as evidenced by an ideal adsorbed solution theory selectivity (SF 6 /N 2 , v: v = 50:50, 273 K) increase of 75.0, 668.8, and 502.8% compared to the nonfluorinated POPs. These findings highlight the potential of fluorination as a strategy for tailoring the properties of POP materials for advanced gas separation applications.

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Self‐adaptive Coordination Evolution Mediated Pore‐Space‐Partition in Metal–Organic Frameworks for Boosting SF₆/N₂ Separation

Ruan,

Wu,

Liao

et al. 2024

Angewandte Chemie

0

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The controllable and precise structural regulation of metal‐organic frameworks (MOFs) based on isoreticular chemistry is an effective strategy for creating functional material platforms, such as efficient porous adsorbents. Herein, for the first time, mediated by an unprecedented self‐adaptive coordination evolution (SACE) on pseudo‐D2h‐symmetric [M4(μ3‐O)2(COO)6] (M = Mn/Fe) clusters, two pore space partitioned MOFs (CTGU‐47‐Mn/Fe, CTGU = China Three Gorges University) have been successfully constructed. Owing to the more confined adsorption space and dense binding sites produced by pore space partitioning (PSP), the CTGU‐47‐Mn/Fe exhibit significantly enhanced performance in the capture or recovery SF6 (greenhouse/electronic specialty gas) from SF6/N2 mixture compared to their non‐partitioned homologous structures (CTGU‐46‐Mn/Fe) with adsorption selectivity increased from 37/72 to 634/157 (v/v, 10/90, 100 kPa). The theoretical calculations also elucidated that the implementation of PSP within CTGU‐47‐Mn/Fe leads to dramatically strengthened binding affinity for SF6 over N2 through extra multiple F···H interactions. This study represents a valuable advance in crystal engineering field: the SACE of polynuclear metal clusters is expected to be useful in the structural regulation of MOFs and the fabrication of advanced porous adsorbents.

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Self‐adaptive Coordination Evolution Mediated Pore‐Space‐Partition in Metal–Organic Frameworks for Boosting SF₆/N₂ Separation

Ruan,

Wu,

Liao

et al. 2024

Angew Chem Int Ed

0

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The controllable and precise structural regulation of metal‐organic frameworks (MOFs) based on isoreticular chemistry is an effective strategy for creating functional material platforms, such as efficient porous adsorbents. Herein, for the first time, mediated by an unprecedented self‐adaptive coordination evolution (SACE) on pseudo‐D2h‐symmetric [M4(μ3‐O)2(COO)6] (M = Mn/Fe) clusters, two pore space partitioned MOFs (CTGU‐47‐Mn/Fe, CTGU = China Three Gorges University) have been successfully constructed. Owing to the more confined adsorption space and dense binding sites produced by pore space partitioning (PSP), the CTGU‐47‐Mn/Fe exhibit significantly enhanced performance in the capture or recovery SF6 (greenhouse/electronic specialty gas) from SF6/N2 mixture compared to their non‐partitioned homologous structures (CTGU‐46‐Mn/Fe) with adsorption selectivity increased from 37/72 to 634/157 (v/v, 10/90, 100 kPa). The theoretical calculations also elucidated that the implementation of PSP within CTGU‐47‐Mn/Fe leads to dramatically strengthened binding affinity for SF6 over N2 through extra multiple F···H interactions. This study represents a valuable advance in crystal engineering field: the SACE of polynuclear metal clusters is expected to be useful in the structural regulation of MOFs and the fabrication of advanced porous adsorbents.

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Control of pore environment in nickel-based metal-organic frameworks for SF6/N2 separation

Cited by 8 publications

References 28 publications

Fluorine Incorporation for Enhanced Gas Separation Performance in Porous Organic Polymers: Investigating Reaction Pathways and Pore Structure Control

Fluorine Incorporation for Enhanced Gas Separation Performance in Porous Organic Polymers: Investigating Reaction Pathways and Pore Structure Control

Self‐adaptive Coordination Evolution Mediated Pore‐Space‐Partition in Metal–Organic Frameworks for Boosting SF₆/N₂ Separation

Self‐adaptive Coordination Evolution Mediated Pore‐Space‐Partition in Metal–Organic Frameworks for Boosting SF₆/N₂ Separation

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Control of pore environment in nickel-based metal-organic frameworks for SF6/N2 separation

Cited by 8 publications

References 28 publications

Fluorine Incorporation for Enhanced Gas Separation Performance in Porous Organic Polymers: Investigating Reaction Pathways and Pore Structure Control

Fluorine Incorporation for Enhanced Gas Separation Performance in Porous Organic Polymers: Investigating Reaction Pathways and Pore Structure Control

Self‐adaptive Coordination Evolution Mediated Pore‐Space‐Partition in Metal–Organic Frameworks for Boosting SF6/N2 Separation

Self‐adaptive Coordination Evolution Mediated Pore‐Space‐Partition in Metal–Organic Frameworks for Boosting SF6/N2 Separation

Contact Info

Product

Resources

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Self‐adaptive Coordination Evolution Mediated Pore‐Space‐Partition in Metal–Organic Frameworks for Boosting SF₆/N₂ Separation

Self‐adaptive Coordination Evolution Mediated Pore‐Space‐Partition in Metal–Organic Frameworks for Boosting SF₆/N₂ Separation