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Inorganic Node-Tuned Reticular Diversification of Metal-Organic Frameworks: Dual-Site Functionalization for Enhanced

Ke Zhao1, Xishuo Zhang2, Wen Jiang1

  • 1Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Key Laboratory of Advanced Catalysis and Adsorption Materials, College of Chemistry and Materials Sciences, Zhejiang Normal University, Jinhua 321004, P.R. China.

ACS Applied Materials & Interfaces
|March 23, 2026
PubMed
Summary
This summary is machine-generated.

A new metal-organic framework, ZJNU-409, was synthesized using reticular chemistry. This MOF demonstrates excellent selectivity for separating valuable hydrocarbons and CO2 from methane, showing great promise for methane purification applications.

Keywords:
Crystal StructuralGas AdsorptionMetal−Organic FrameworksMethane SeparationReticular Chemistry

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Area of Science:

  • Materials Science
  • Chemistry
  • Nanotechnology

Background:

  • Reticular chemistry enables targeted synthesis of metal-organic frameworks (MOFs) via molecular unit assembly.
  • Metal-organic frameworks (MOFs) are porous materials with tunable structures and properties.
  • Developing efficient MOFs for gas separation is crucial for industrial applications.

Purpose of the Study:

  • To investigate inorganic node-directed reticular diversification of MOFs.
  • To synthesize and characterize a new MOF, ZJNU-409, with potential gas separation capabilities.
  • To evaluate the selective adsorption performance of ZJNU-409 for various gases over methane.

Main Methods:

  • Employed a nitrogen-containing aromatic polycarboxylate ligand as a 4-connected organic node.
  • Systematically tuned inorganic secondary building units (SBUs) to achieve diverse topological structures.
  • Utilized Ideal Adsorbed Solution Theory (IAST) and grand canonical Monte Carlo (GCMC) simulations for performance evaluation.
  • Conducted fixed-bed breakthrough experiments to validate gas separation efficiency.

Main Results:

  • Successfully synthesized a new pts-topology MOF, ZJNU-409, using Zn-based paddlewheel nodes.
  • ZJNU-409 exhibits a 3D framework with 1D channels and dual-site functionalization.
  • Achieved high selectivities for C2H6/CH4 (26), C3H8/CH4 (135), C2H2/CH4 (100), and CO2/CH4 (29) via IAST calculations.
  • Breakthrough experiments confirmed preferential retention of target gases over methane, supported by GCMC findings of stronger framework-gas interactions.

Conclusions:

  • ZJNU-409, a novel MOF, demonstrates significant potential for selective gas adsorption.
  • The synthetic strategy of inorganic node-directed diversification is effective for creating diverse MOF topologies.
  • ZJNU-409 shows excellent promise for efficient methane purification applications due to its selective adsorption capabilities.