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Synthetic Methodology for Asymmetric Ferrocene Derived Bio-conjugate Systems via Solid Phase Resin-based Methodology
Published on: March 12, 2015
Electronic communication in oligonuclear ferrocene complexes with anionic four-coordinate boron bridges
Linda Kaufmann1, Jens-Michael Breunig, Hannes Vitze
1Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Strasse 7, 60438, Frankfurt (Main), Germany.
Dalton Transactions (Cambridge, England : 2003)
|April 9, 2009
Summary
Di- and trinuclear ferrocene compounds exhibit reversible redox behavior. Structural and spectroscopic analyses suggest through-space or electrostatic electronic interactions between iron atoms, rather than intervalence charge transfer.
Area of Science:
- Organometallic Chemistry
- Electrochemistry
- Solid-State Chemistry
Background:
- Ferrocene derivatives are crucial in organometallic chemistry.
- Understanding electronic interactions in polynuclear ferrocenes is key to designing new materials.
Purpose of the Study:
- Investigate the electrochemical properties of di- and trinuclear ferrocene species.
- Determine the extent of intervalence charge-transfer (ICT) upon partial oxidation.
- Elucidate the electronic communication pathways between iron centers.
Main Methods:
- Cyclic voltammetry (CV) to study redox potentials.
- X-ray crystallography to determine molecular structure.
- Mössbauer spectroscopy for electronic state analysis.
- Spectroelectrochemistry to detect ICT bands.
Main Results:
- Li[Fc-BPh(2)-Fc] (Li[]) shows two distinct one-electron redox waves.
- Li(2)[Fc-BPh(2)-fc-BPh(2)-Fc] (Li(2)[]) exhibits a two-electron process and a further wave.
- X-ray crystallography indicates a charge-localized structure in the mixed-valent state.
- Spectroelectrochemistry did not reveal ICT absorptions.
Conclusions:
- Electronic interactions in these ferrocene species are likely through-space or electrostatic.
- The absence of ICT bands suggests limited electronic delocalization.
- The compounds display reversible electrochemical behavior suitable for further applications.
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