Cationic Organic Dyes for Photoredox Transformations
The field of photoredox catalysis has grown exponentially in the last decade because it provides synthetic chemists with a means to perform free-radical reactions under mild conditions and irradiation from simple, household light sources. In a vast majority of the contributions, these transformations have been mediated by transition-metal catalysts, in particular polypyridyl ruthenium and iridium complexes, decreasing the economic benefit of these reactions.
However, the possibility of using metal-free catalysts, such as organic dyes, for achieving efficient light-mediated photoredox reactions is an attractive option, as they offer a variety of environmental and economic benefits. Recently, the group of Professor Juan C. (Tito) Scaiano from the University of Ottawa (Canada) has reported a systematic study of the efficiency of cationic organic dyes as catalysts for photoredox transformations.
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