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Spectroscopic analysis demonstrates solvent and ligand control over charge-separated state lifetimes in cerium(IV) photocatalysis, highlighting improved oxidation yields via chloride radicals.
Photoexcitation of the cerium(IV) photocatalysts triggers ligand-to-metal charge transfer, ejecting chloride radicals (Cl•) or nitrate radicals (NO3•) into solution. The solvent and ligand identity govern the lifetime of the resulting charge-separated state, as captured by broadband transient absorption spectroscopy. Chloride radicals react orders of magnitude faster with toluene substrates, enabling dramatically improved photocatalytic oxidation yields. More in Research Article e6538194, Ahmed M. El-Zohry and co-workers.
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Parida et al. (2026) studied this question.
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