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Related Experiment Video

Updated: Jul 26, 2025

A Dual-Functional Electroactive Filter Towards Simultaneously SbIII Oxidation and Sequestration
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Do Corroles Stabilize Tetravalent Antimony?

Simon Eulberg1, Nina Schulze1, Jens Krumsieck1

  • 1Institute of Inorganic and Analytical Chemistry, TU Braunschweig, Hagenring 30, 38106, Braunschweig, Germany.

Angewandte Chemie (International Ed. in English)
|June 15, 2023
PubMed
Summary
This summary is machine-generated.

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Researchers synthesized novel antimony corrole cations, revealing structural insights and electronic properties. These compounds exhibit unique redox behavior, forming antimony(V) derivatives in the presence of water or fluoride.

Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Supramolecular Chemistry

Background:

  • Antimony corroles are macrocyclic compounds with unique electronic and structural properties.
  • Previous studies have focused on antimony(III) and antimony(V) complexes, with limited exploration of antimony corrole cations.

Purpose of the Study:

  • To synthesize and characterize novel antimony corrole cations through one-electron oxidation.
  • To investigate the structural, electronic, and redox properties of these new antimony corrole species.
  • To explore the reactivity of antimony corrole cations in the presence of water and fluoride.

Main Methods:

  • One-electron oxidation of antimony(III) corroles using silver(I) and copper(II) salts.
  • X-ray crystallography for structural determination.
Keywords:
AntimonyCorroleLigand RadicalsNon-InnocencePorphyrinoids

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  • Electron Paramagnetic Resonance (EPR) spectroscopy to study electronic properties.
  • Density Functional Theory (DFT) analysis for electronic structure calculations.

    • Main Results:

    • Successful isolation and crystallization of antimony corrole cations for the first time.
    • X-ray crystallography confirmed structural similarities with antimony(III) corroles.
    • EPR experiments revealed strong hyperfine interactions with 121Sb and 123Sb nuclei.
    • DFT analysis indicated the oxidized form is primarily a SbIII corrole radical with minimal SbIV character.
    • Redox disproportionation reactions were observed, yielding antimony(III) corroles and novel antimony(V) derivatives (difluorido- or oxido-antimony(V)corroles) via hydroxo-antimony(V) intermediates.

    Conclusions:

    • The study reports the first successful synthesis and characterization of antimony corrole cations.
    • The findings provide crucial insights into the electronic structure and redox behavior of antimony corrole systems.
    • The observed redox disproportionation opens avenues for synthesizing new antimony(V) corrole complexes with potential applications.