Divalent samarium compounds are important reagents for reductive transformations in organic chemistry. However, currently, a high amount of this reagent is required in most reactions, and it also necessitates the use of harmful chemicals. To address this issue, researchers have developed a visible-light-antenna ligand that coordinates with stable trivalent samarium compounds, which, upon exposure to visible light, are reduced to divalent samarium, enabling milder conditions and smaller amounts of samarium for reactions.
source https://www.sciencedaily.com/releases/2024/09/240919115242.htm
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