Shining Fresh Light on Complex Photoredox Mechanisms through Isolation of Intermediate Radical Anions.

ABSTRACT: Photoredox catalysis (PRC) has gained enormous and wide-ranging interest in recent years but has also been subject to significant mechanistic uncertainty, even controversy. To provide a method by which the missing understanding can begin to be filled in, we demonstrate herein that it is possible to isolate as authentic materials the one-electron reduction products of representative PRC catalysts (PCs). Specifically, KC₈ reduction of both 9,10-dicyanoanthracene and a naphthalene monoamide derivative in the presence of a cryptand provides convenient access to the corresponding [K(crypt)⁺][PC^·-] salts as clean materials that can be fully characterized by techniques including EPR and XRD. Because PC^·- states are key intermediates in PRC reactions, su

SUBMITTER: Horsewill SJ 

PROVIDER: S-EPMC10367049 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature