Updated

Updated · ScienceDaily · Aug 9

UW-Madison Chemists Break Decades-Old Electron-Transfer Rule with Nature Catalyst

Updated

Updated · ScienceDaily · Aug 9

UW-Madison Chemists Break Decades-Old Electron-Transfer Rule with Nature Catalyst

Q: How does releasing a free electron into solution allow chemists to bypass traditional thermodynamic limits in redox reactions?

Releasing a free electron into solution lets chemists escape the usual rule that the electron must go to the easiest-to-reduce molecule. In standard single-electron transfer, selectivity is set at the moment of transfer by thermodynamics: the substrate with the more favorable redox potential wins. Here, the catalyst instead creates a solvated electron, an extremely reactive reducing species that is so unstable in solution it will enter almost any nearby molecule at near diffusion-limited rates. That changes where selectivity is determined. Instead of being decided before or during electron transfer, it is decided afterward. Both the intended substrate and the easier-to-reduce competitor may briefly accept electrons, but they do not have the same fate. Computational work from Colorado State and spectroscopy from CU Boulder showed that the desired reactant can move quickly into productive follow-up chemistry, while the easier-to-reduce partner undergoes back electron transfer and is effectively recycled to its starting state. In practical terms, the method shifts control from thermodynamic preference to kinetic competition between downstream steps and reversal. That is why chemists can now activate a harder-to-reduce substrate even in the presence of a more easily reduced one. The result is a stronger, less discriminating reducing environment that makes previously blocked coupling reactions possible and opens a new design framework for redox chemistry.

1 articles · Updated · ScienceDaily · Aug 9

UW-Madison-led chemists reported in Nature that a new catalyst can eject electrons directly into solution, bypassing the usual rule that electrons go to the easiest molecule to reduce.
Free electrons make previously disfavored reactants viable because selectivity emerges after transfer: the target molecule keeps moving toward product, while the easier-to-reduce partner is recycled to its starting state.
Colorado State computational work and CU Boulder spectroscopy helped explain that post-transfer pathway, supporting a reaction framework that overturns standard thermodynamic expectations.
Five years of catalyst development produced a method that could open previously inaccessible coupling reactions for drug discovery, advanced materials and biomimetic chemistry.

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ScienceDaily11d ago

UW-Madison Chemists Break Electron Transfer Barrier with Novel Catalyst

If a new catalyst breaks the golden rule of electron transfer, what previously impossible drug molecules can we now create?

Could a catalyst that indiscriminately ejects electrons redefine the future of pharmaceutical manufacturing and materials science?

How does releasing a free electron into solution allow chemists to bypass traditional thermodynamic limits in redox reactions?

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1 total

ScienceDaily11d ago

UW-Madison Chemists Break Electron Transfer Barrier with Novel Catalyst

UW-Madison Chemists Break Decades-Old Electron-Transfer Rule with Nature Catalyst

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