Note
Carbon tetrachloride and trichloroethylene in a water photolysis system [Pt colloid/Ru(bipy)3 2+/MV2+/EDTA] were reduced to methane and/or ethane during solar illumination. This paper demonstrates that solar energy can be used to excite electron-transfer reactions in the system, which results in the cleavage of water to H2 and OH-. Data suggest chlorinated hydrocarbons added to the system can be dechlorinated and subsequently reduced to low molecular weight hydrocarbons.