Flipping photoredox selectivity with indiscriminate electron transfer
Chemists have developed a new method for light-driven redox reactions that bypasses traditional reduction potential limitations. By using an electrochemically generated photocatalyst, the team can control reaction selectivity through the rate of electron transfer rather than molecular potential.
Why it matters
This breakthrough provides a new blueprint for chemical synthesis, potentially enabling the creation of complex molecules that were previously considered too difficult or impossible to couple.
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Electron transfer is a powerful way to accomplish chemical transformations, especially when driven by light or electricity .
Redox reactions naturally depend on how easy or difficult it is for the molecules involved to accept or part with electrons, a property described by their reduction or oxidation potential. The molecule that is easiest to give an electron to will get it first, a property that chemists can leverage to design highly selective reactions. But a reaction that depends on selectively giving an electron to the more reluctant of two possible acceptors will be prohibitively difficult.
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