Die photooxidation von chlorid zu chlor mit anthrachinonderivaten in wässriger lösung : Ein beitrag zur speicherung von sonnenenergie als chemische energie

Chloride transfers an electron to photochemically excited anthraquinonesulfonic and -methanosulfonic acid in its triplet state. In presence of oxygen the obtained semiquinone radical of the anthraquinonederivative is oxidized to the ground state anthraquinone, ready for another reactioncycle. The chloride is oxidized to chlorine. The quantum yield of this photooxidation, which also proceeds in sunlight, is found to be between 0.1 and 0.13. The absorbed light energy is partly stored in chemical energy of the chlorine molecule. The quantum yield is compared to the anthraquinone phosphorescence emission and the lifetime of the triplet state.