Photocatalytic Carboxylation with CO2: A Review of Recent Studies

Abstract Carbon dioxide (CO 2 ) is the main byproduct from the combustion of fossil fuels, the excessive emission into the atmosphere is regarded as primary causes for global warming and climate change. On the other hand, CO 2 is also a readily available, non‐toxic, low‐cost C1 source, and widely used in synthetic chemistry to afford value carboxylic acids and derivatives by photocatalysis CO 2 transformation under light irradiation. Herein, we present a summarization for the recent advances and achievements in the area of photocatalytic carboxylation of unsaturated hydrocarbons, organo(pseudo)halides, carbonyl compounds, tetraalkyl ammonium salt, and C(sp 3 ) C−O bonds with CO 2 . We also discuss the mechanisms of such reactions, which will help us to comprehend the specific process of carboxylation. We hope the summary of these methods will further stimulate future research in this sought‐after area.