, Mirica and postdoctoral researcher Hanah Na report their work on the development of a completely novel tridentate ligand that coordinates with nickel to create a catalyst that can be directly activated by light to form a carbon-oxygen bond without the use of an additional photocatalyst. C-O bonds are prevalent in many natural products, pharmaceuticals, and agrochemicals.
"It's very stable. But all of those intermediates over the past decade have been way too stable. They're not competent in catalytic applications," Mirica said. Typically, Mirica explained, classic organic chemists have a particular chemical transformation in mind and try whatever catalysts they think will be good, and whatever conditions or additives would be useful and optimize it, focusing on a very specific transformation.
From a mechanical perspective, the photocatalytic cycle is well-understood, but the Ni-mediated redox cycle has remained a mystery.
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