The effect of water on visible-light-driven generation of aryl radicals or aryl cations from colored shelf-stable arylazo sulfonates has been investigated. Photoinduced ionic and radical decomposition of these salts compete, depending on the media used. In organic solvents, light-induced homolysis of the N-S bond occurs, and the resulting aryl radical may be used to some extent for arylation reactions. On the contrary, in neat water, radical chemistry is prevented by an efficient photoheterolysis, and a reactive aryl cation is otherwise generated.
Water Effect on the Photochemistry of Arylazo Sulfonates
Nicchio, Luca;Amin, Hawraz Ibrahim;Genualdo, Stefano;Protti, Stefano;Fagnoni, Maurizio
2025-01-01
Abstract
The effect of water on visible-light-driven generation of aryl radicals or aryl cations from colored shelf-stable arylazo sulfonates has been investigated. Photoinduced ionic and radical decomposition of these salts compete, depending on the media used. In organic solvents, light-induced homolysis of the N-S bond occurs, and the resulting aryl radical may be used to some extent for arylation reactions. On the contrary, in neat water, radical chemistry is prevented by an efficient photoheterolysis, and a reactive aryl cation is otherwise generated.File in questo prodotto:
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