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Related Concept Videos

Extraction: Advanced Methods00:56

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...
Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride01:26

Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride

Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation reactions,...

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Related Experiment Video

Updated: Jun 13, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
07:45

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Published on: August 16, 2018

Utilization of Robust Zr-Based Metal-Organic Framework for Efficient N2/H2 Separation.

Jieru Zhang1, Xia Chen1, Zhilu Wang1

  • 1School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255000, China.

Materials (Basel, Switzerland)
|June 12, 2026
PubMed
Summary

Researchers developed advanced metal-organic frameworks for efficient nitrogen (N2)-hydrogen (H2) gas separation. UiO-66-F4 demonstrated superior performance in capturing N2, offering a promising industrial solution.

Keywords:
UiO MOFsadsorptive separationhydrogenmolecular dynamic simulationnitrogen

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Published on: June 23, 2023

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Last Updated: Jun 13, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
07:45

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

Synthesis of Triazole and Tetrazole-Functionalized Zr-Based Metal-Organic Frameworks Through Post-Synthetic Ligand Exchange
04:51

Synthesis of Triazole and Tetrazole-Functionalized Zr-Based Metal-Organic Frameworks Through Post-Synthetic Ligand Exchange

Published on: June 23, 2023

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Separation Technology

Background:

  • Energy-efficient separation of nitrogen (N2) and hydrogen (H2) is crucial for industrial processes but remains challenging.
  • Adsorptive separation using advanced materials is a promising strategy for N2-H2 purification.
  • Designing metal-organic frameworks (MOFs) with specific properties is key to high-performance adsorbents.

Purpose of the Study:

  • To evaluate three isoreticular zirconium-based MOFs (UiO-66, UiO-66-CH=CH2, UiO-66-F4) for industrial N2-H2 gas separation.
  • To understand the adsorption mechanisms and diffusion kinetics of N2 and H2 on these MOFs.
  • To identify an optimal MOF for efficient N2 capture from N2-H2 mixtures under industrial conditions.

Main Methods:

  • Systematic evaluation of UiO-66, UiO-66-CH=CH2, and UiO-66-F4 for N2-H2 separation.
  • Utilized static adsorption isotherms, dynamic breakthrough experiments, and molecular dynamics (MD) simulations.
  • Characterized adsorption mechanisms and diffusion kinetics.

Main Results:

  • UiO-66-F4 demonstrated superior performance in capturing N2 from N2-H2 mixtures.
  • Optimal performance attributed to balanced binding affinity, high nitrogen uptake, and favorable diffusion dynamics.
  • UiO-66-F4 shows effective micro-/mesoporous diffusion for N2 under simulated industrial conditions.

Conclusions:

  • UiO-66-F4 is a highly effective adsorbent for N2-H2 separation.
  • The study provides a promising alternative material for industrial N2-H2 purification.
  • Tailored MOF design is critical for achieving energy-efficient gas separation technologies.