Visible light-induced photoreactions have undergone extensive development recently. The so-called "visible light photo-oxidant catalyst," a photocatalyst enabling simultaneous single-electron oxidation and reduction under visible light irradiation, has drawn a lot of interest. In general, the reaction cycle using a photooxidant catalyst exhibits a "redox-neutral" mechanism since it uses both oxidation and reduction pathways.
Light, redox processes, and thermal activation with the provision of high energy are often necessary for the production of free radical species. For photocatalytic research, Alfa Chemistry provides its clients with a variety of visible light photo-redox catalyst materials, such as organocatalysts and transition metal complex catalysts. It forms free radical species under mild conditions, such as irradiation with visible light.
Fig 1. Visible light photoredox catalysts (λ = local absorbance maximum for lowest energy absorption).
Photo-oxidation catalysis relies on the excitation of visible light to accelerate an ever-increasing number of chemical reactions.
- Precious metal iridium (III) or ruthenium (II) complexes act as single-electron reducers or oxidizers in the vast majority of photo-redox processes.
- Metal-free organocatalysts have been created. Due to the excited state's long-lasting charge separation under visible light irradiation, some acridinium compounds with donor-acceptor structures can act as photooxidation catalysts.
- The use of copper-based photocatalysts is increasing quickly, and they have benefits beyond just economic and ecological ones.
- Additionally, effective bicatalytic systems for cross-coupling reactions have been developed using standard photocatalysts and copper (I) or copper (II) salts.
If you don't find what you have been looking for, please feel free to contact us.
Reference
- Garrido-Castro A. F, et al. (2020). "α-Functionalization of Imines via Visible Light Photoredox Catalysis." Catalysts. 10(5): 562.