Chemists at the University of Wisconsin-Madison, working with collaborators at Colorado State University and the University of Colorado Boulder, have developed a new reaction strategy that could overcome a long-standing limitation in electron-transfer chemistry, according to ScienceDaily.
Single-electron transfer is widely used to help build complex molecules for drugs, materials, and biological research. But under traditional rules, an electron usually goes to the molecule that is easier to reduce, which can limit which reactions can be directed.
In the new approach, the team designed a catalyst that ejects an electron directly into the surrounding solvent rather than handing it to a specific molecule. Lead researcher Zachary Wickens said that creates an especially powerful source of electrons, since a free electron is eager to attach to almost anything nearby.
The researchers say this changes how selectivity works: the desired molecule can keep moving toward product formation, while the molecule that is normally favored for reduction can end up back where it started. The findings, reported in Nature, suggest the method could make new coupling reactions possible and offer a different way to design redox reactions.
