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Updated: Sep 24, 2025

Synthesis and Characterization of Functionalized Metal-organic Frameworks
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New functionalized MIL-53(In) solids: syntheses, characterization, sorption, and structural flexibility.

Lei Wu1,2, Gérald Chaplais3,4, Ming Xue5

  • 1Polymer Materials & Engineering Department, School of Materials Science & Engineering, Chang'an University Xi'an 710064 China wulei@chd.edu.cn.

RSC Advances
|May 6, 2022
PubMed
Summary
This summary is machine-generated.

Functionalizing indium-based metal-organic frameworks (MIL-53(In)) with different chemical groups alters their pore properties. Bromine and nitro groups enhance nitrogen adsorption, while hydroxyl groups block porosity.

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Area of Science:

  • Materials Science
  • Chemistry
  • Nanotechnology

Background:

  • Metal-organic frameworks (MOFs) offer tunable porosity for various applications.
  • MIL-53(In) is a flexible MOF with potential for gas storage and separation.
  • Functionalization of MOF linkers can modify framework properties and guest interactions.

Purpose of the Study:

  • To synthesize and characterize functionalized MIL-53(In) materials.
  • To investigate the impact of linker functional groups on framework flexibility and pore accessibility.
  • To explore how different substituents influence gas adsorption properties.

Main Methods:

  • Synthesis of functionalized MIL-53(In) with varying terephthalate linkers (-(OH)2, -Br, -NO2).
  • Characterization using single crystal X-ray diffraction, N2 adsorption-desorption isotherms, and infrared spectroscopy.
  • Analysis of dynamic framework behavior and guest-framework interactions.

Main Results:

  • Dihydroxyl functionalization resulted in a loss of accessible porosity.
  • Bromine and nitro functionalization modulated the framework's ability to adsorb nitrogen.
  • Steric hindrance and chemical nature of substituents influenced framework flexibility and guest interactions.

Conclusions:

  • Linker functionalization is a viable strategy to tune MIL-53(In) properties.
  • Specific functional groups (-Br, -NO2) can enhance nitrogen accommodation.
  • Framework flexibility and pore accessibility are sensitive to linker modification.