A new trap for singlet oxygen in aqueous solution

Abstract

The sodium and caesium salts of anthracene-9,10-bisethanesulphonic acid are soluble in water, and readily react with singlet oxygen without appreciable quenching to give the stable endoperoxide; kinetic parameters are reported and it is shown that in the decomposition of peroxymonophthalic acid at pH 8·2, 69 ± 4% of the oxygen produced is in the singlet state.