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Electron Cartography in Clusters.

Raúl Hernández Sánchez1, Anouck M Champsaur1, Bonnie Choi1

  • 1Department of Chemistry, Columbia University, New York, NY, 10027, USA.

Angewandte Chemie (International Ed. in English)
|September 5, 2018
PubMed
Summary
This summary is machine-generated.

Ligand sphere symmetry dictates electron distribution in cobalt-selenium clusters. This understanding is key for optimizing clusters in biological and synthetic applications.

Keywords:
clusterselectron density distributionmixed-valent compoundsmultiple-wavelength anomalous diffraction

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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Crystallography

Background:

  • Determining atom-specific electron density in polynuclear systems is complex.
  • Cobalt-selenium clusters are relevant in various chemical and biological systems.

Purpose of the Study:

  • To investigate how ligand sphere symmetry influences electron density distribution in [Co6Se8] clusters.
  • To correlate electron distribution with cluster performance in different environments.

Main Methods:

  • Multiple-wavelength anomalous diffraction (MWAD) was employed.
  • Four [Co6Se8] clusters with symmetric and asymmetric ligand spheres were studied.

Main Results:

  • In asymmetric clusters, the CO-bound cobalt atom is more oxidized; electron removal localizes holes on selenium atoms.
  • In symmetric clusters, cobalt atoms form two sets of three; electron removal distributes holes across all cobalt atoms.
  • Ligand-dependent tuning of electron/hole distribution was observed.

Conclusions:

  • Ligand sphere design significantly impacts electron localization in cobalt-selenium clusters.
  • Understanding electron distribution is crucial for tailoring cluster properties for specific applications.