Abstract
It is believed that chemiluminescence (CL) of photolyzed aromatic compounds proceeds in alkaline media and in the presence of oxygen, with various reactive oxygen species (ROS). In order to prove this hypothesis we have investigated the contribution of chemically produced ROS, such as hydroxyl radicals, singlet oxygen as well as superoxide radical anions on CL reactions of photolyzed aromatic compounds. The results of this investigation show, indeed, that the light emission (CL) is due to the reaction of photoproducts of aromatic ketones with singlet oxygen or superoxide radical anion. The contribution of hydroxyl radicals in this CL reaction is insignificant. Although, the CL light efficiency of the above reactions is not high, the results of this study can be used for the quantitative determination of some of these ROS as well as for the aromatic compounds down to few parts per billion.
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