AI Article Synopsis
- Ferrocene has been a widely studied organometallic molecule, but its structure and electronic properties have remained unchanged for over 70 years, with no successful attempts at chemically oxidizing it.
- Researchers used a metal organic framework to alter ferrocene’s electronic and magnetic properties, achieving a previously unseen high-spin Fe(II) state that can oxidize to Fe(III) by binding oxygen from the air.
- The study utilized various advanced analytical techniques to support their findings, demonstrating that the binding of oxygen is reversible through temperature changes.
Article Abstract
Ferrocene is perhaps the most popular and well-studied organometallic molecule, but our understanding of its structure and electronic properties has not changed for more than 70 years. In particular, all previous attempts of chemically oxidizing pure ferrocene by binding directly to the iron center have been unsuccessful, and no significant change in structure or magnetism has been reported. Using a metal organic framework host material, we were able to fundamentally change the electronic and magnetic structure of ferrocene to take on a never-before observed physically stretched/bent high-spin Fe(II) state, which readily accepts O from air, chemically oxidizing the iron from Fe(II) to Fe(III). We also show that the binding of oxygen is reversible through temperature swing experiments. Our analysis is based on combining Mößbauer spectroscopy, extended X-ray absorption fine structure, in situ infrared, SQUID, thermal gravimetric analysis, and energy dispersive X-ray fluorescence spectroscopy measurements with ab initio modeling.
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| http://dx.doi.org/10.1021/jacs.3c05754 | DOI Listing |
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