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Synthesis and Characterization of Functionalized Metal-organic Frameworks
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Frustrated flexibility in metal-organic frameworks.

Roman Pallach1, Julian Keupp2, Kai Terlinden1

  • 1Anorganische Chemie, Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, Dortmund, Germany.

Nature Communications
|July 3, 2021
PubMed
Summary
This summary is machine-generated.

We introduce "frustrated flexibility" in metal-organic frameworks (MOFs). This controlled linker functionalization enables MOFs to reversibly lose and regain crystalline order in response to stimuli, crucial for advanced applications.

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Area of Science:

  • Materials Science
  • Chemistry
  • Nanotechnology

Background:

  • Stimuli-responsive flexible metal-organic frameworks (MOFs) are key for technological applications.
  • Understanding their structural dynamics is crucial for optimizing performance.

Purpose of the Study:

  • Introduce the concept of "frustrated flexibility" in MOFs.
  • Investigate a new type of guest- and temperature-responsive structural flexibility.
  • Explore the implications for MOF performance.

Main Methods:

  • Controlled linker functionalization with alkoxy groups.
  • Probing stimuli-dependent phase changes using global and local structure techniques.
  • Employing computer simulations to understand framework deformations.

Main Results:

  • Demonstrated MOFs with "frustrated flexibility" showing reversible loss/recovery of crystalline order.
  • Observed non-correlated deformations of inorganic building units during phase transitions.
  • Validated the concept through combined experimental and computational approaches.

Conclusions:

  • "Frustrated flexibility" is a novel mechanism in MOFs driven by competing forces.
  • This phenomenon is critical for the performance of MOFs in various applications.
  • Suggests "frustrated flexibility" may be a widespread property in MOF materials.