Enhancing photoredox catalysis by suppressing back electron transfer with the aid of a spin catalyst.

ABSTRACT: While organic dye-based photoredox catalysis provides a sustainable platform for inert bond activation, its efficiency remains limited by detrimental back electron transfer (BET) processes. Herein, we present a spin catalysis strategy that addresses this challenge by manipulating the spin kinetics of radical ion pairs (RIPs) using Gd-DOTA as a spin catalyst. In photocatalytic hydrodechlorination of methyl 4-chlorobenzoate, this approach achieved a remarkable spin catalysis effect (SCE) of 70%, accompanied by a 25-fold acceleration in reaction kinetics (65% conversion in 25 min vs. 640 min without spin catalyst). The generality of SCE was demonstrated across diverse substrates spanning varied functional groups and halides (Cl/Br/I). Through integrated time-resolved spectroscopic meas

SUBMITTER: Dong Z 

PROVIDER: S-EPMC12394894 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature