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New open frameworks based on metal pyridylphosphonates.

P Ayyappan1, O R Evans, B M Foxman

  • 1Department of Chemistry, Venable and Kenan Laboratories CB#3290, University of North Carolina, Chapel Hill, North Carolina 27599, USA.

Inorganic Chemistry
|October 30, 2001
PubMed
Summary

New metal pyridylphosphonate coordination networks were synthesized, forming diverse 1D, 2D, and 3D structures. These metal-organic frameworks exhibit interesting open channels and cavities, demonstrating their potential for various applications.

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Area of Science:

  • Coordination Chemistry
  • Materials Science
  • Crystallography

Background:

  • Metal-organic frameworks (MOFs) are crystalline materials with tunable structures and properties.
  • Pyridylphosphonates are versatile ligands for constructing coordination networks with diverse architectures.
  • Hydro(solvo)thermal synthesis is a common method for preparing coordination compounds.

Purpose of the Study:

  • To synthesize and characterize novel coordination networks using metal pyridylphosphonates.
  • To explore the structural diversity (1D, 2D, and 3D) achievable with these building blocks.
  • To investigate the potential for creating open frameworks with accessible channels or cavities.

Main Methods:

  • Hydro(solvo)thermal synthesis was employed to create the coordination networks.

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  • Single-crystal X-ray diffraction was used to determine the detailed crystal structures.
  • Characterization of six distinct metal pyridylphosphonate compounds (1-6) was performed.

    • Main Results:

    • A series of 1D, 2D, and 3D coordination networks based on zinc, cobalt, copper, and cadmium pyridylphosphonates were successfully synthesized.
    • Compound 1 exhibited a 1D ladder structure, while compound 2 formed a 2D grid.
    • Compounds 3-6 displayed diverse 3D framework structures, with compound 3 showing open channels and compound 4 featuring cavities for guest molecules (water and DMSO, respectively).

    Conclusions:

    • Metal pyridylphosphonates are effective building blocks for constructing coordination networks with varying dimensionalities.
    • The synthetic approach readily yields interesting open framework structures.
    • The resulting frameworks possess potential for applications requiring porous materials.