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Area of Science:

  • Materials Science
  • Crystallography
  • Supramolecular Chemistry

Background:

  • Metal-organic frameworks (MOFs) offer tunable properties for various applications.
  • Cyclodextrins (CDs) are versatile hosts for constructing MOF architectures.
  • Efficient synthesis methods are crucial for expanding MOF accessibility.

Purpose of the Study:

  • To synthesize novel cyclodextrin-based metal-organic frameworks (MOFs).
  • To introduce and validate a "fast crystallization" method for rapid MOF synthesis.
  • To characterize the structural and intermolecular properties of the new MOFs.

Main Methods:

  • Synthesis of six novel cyclodextrin-based MOFs using diverse crystallization techniques.
  • Introduction of a modified vapor diffusion method termed "fast crystallization" for rapid MOF formation.
  • Structural characterization via single-crystal X-ray diffraction and powder X-ray diffraction.
  • Hirshfeld surface analysis using Crystal Explorer to investigate intermolecular interactions.

Main Results:

  • Four new MOFs were successfully synthesized using the fast crystallization method.
  • Five MOFs were structurally characterized, revealing diverse framework types and isostructural relationships.
  • Compound 2 (α-CD-K-2) and Compound 3 (α-CD-Rb-3) formed isostructural 3D frameworks.
  • Compound 6 (γ-CD-K-6) incorporated an iodine ion with specific occupancy.

Conclusions:

  • The fast crystallization method is effective for the rapid synthesis of cyclodextrin-based MOFs.
  • The synthesized MOFs exhibit varied structural motifs and packing arrangements.
  • Detailed structural and intermolecular interaction analyses provide insights into MOF design and properties.