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Composition-driven archetype dynamics in polyoxovanadates.

Aleksandar Kondinski1, Maren Rasmussen2, Sebastian Mangelsen2

  • 1Department of Chemical Engineering and Biotechnology, University of Cambridge Philippa Fawcett Drive S CB3 0AS UK aleksandar@kondinski.com.

Chemical Science
|June 23, 2022
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Summary
This summary is machine-generated.

Researchers explored polyoxovanadates (POVs) using a systems thinking approach. They discovered a new model for POV self-assembly, showing transformations between spherical and cyclic structures, enabling rational design.

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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Supramolecular Chemistry

Background:

  • Molecular metal oxides commonly exhibit stable structural archetypes.
  • Adaptability and transformations between archetypes are key for advanced material design.
  • Polyoxovanadates (POVs) are a class of metal oxides with diverse structural possibilities.

Purpose of the Study:

  • To investigate the transformation pathways of polyoxovanadates (POVs) using arsenate and vanadate building units.
  • To explore the synthesis of novel POV structures with varying nuclearity and morphology.
  • To develop a new model for understanding the continuous evolution of POV assemblies.

Main Methods:

  • Integrated systems thinking approach combining synthetic, analytical, and computational techniques.
  • Synthesis and characterization of low and high nuclearity polyoxovanadate clusters.
  • Solution-phase studies to observe in situ transformations of POV anions.

Main Results:

  • The low nuclearity [V6As8O26]4- anion transforms into higher nuclearity clusters in solution, contrary to typical polyoxometalate (POM) behavior.
  • Synthesis of spherical (kegginoidal) [V12As8O40]4- and tubular cyclic [V10As12O40]8- POVs.
  • Demonstration of facile transformations between different POV structural archetypes.

Conclusions:

  • A conceptually new model for POV self-assembly, describing continuous evolution between spherical and cyclic structures, has been established.
  • This work advances the rational design of polyoxovanadate self-assemblies for specific applications.
  • The findings challenge conventional understanding of POM stability in solution and highlight the dynamic nature of POV chemistry.