Visible-light Induced Photocatalytic Fixation of CO2 into Benzophenone Using Poly(p-phenylene) as a Photocatalyst

Photoreductive fixation of CO2 into benzophenone can be achieved in a CO2-saturated DMF solution by using poly(p-phenylene) as a heterogeneous photocatalyst and triethylamine as an electron donor. The presence of quaternary ammonium salts increases the yield of benzilic acid as a CO2-photofixed product from benzophenone.