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Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase
Published on: December 4, 2017
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Extensive Redox Non-Innocence in Iron Bipyridine-Diimine Complexes: a Combined Spectroscopic and Computational Study
Ranjeesh Thenarukandiyil1, Eno Paenurk2, Anthony Wong3
1Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, 3200008 Haifa, Israel.
Inorganic Chemistry
|November 17, 2021
Summary
Iron bipyridine-diimine (BDI) complexes show five distinct oxidation states, highlighting the ligand
Area of Science:
- Inorganic chemistry, focusing on earth-abundant metal catalysis and redox-active ligands.
Background:
- Metal-ligand cooperation is crucial in catalysis, where ligands can act as electron reservoirs.
- Earth-abundant metals are increasingly studied as sustainable alternatives to precious metals in catalysis.
Purpose of the Study:
- To investigate the redox behavior of iron bipyridine-diimine (BDI) complexes.
- To explore the concept of redox noninnocent ligands in earth-abundant metal catalysis.
Main Methods:
- Synthesis and isolation of iron BDI complexes.
- X-ray crystallography for structural characterization.
- Spectroscopic techniques including 57Fe Mössbauer and EPR spectroscopy.
- Computational studies to determine electronic structure.
Main Results:
- Iron BDI complexes exhibit an extensive electron-transfer series spanning five oxidation states ([Fe(BDI)]3+ to [Fe(BDI)]-1).
- X-ray crystallography confirmed the multifaceted redox noninnocence of the BDI ligand.
- Spectroscopic and computational analyses elucidated the electronic structures of the complexes.
Conclusions:
- The BDI ligand in iron complexes demonstrates significant redox noninnocence.
- These findings expand the understanding of electron-transfer capabilities in earth-abundant metal catalysis.
- Iron BDI complexes offer a versatile platform for exploring multi-electron redox processes.
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