Studies of the Chemiluminescence of Several Xanthene Dyes. I. Kinetic Studies of Uranine and Eosine Chemiluminescence

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Abstract
A kinetic study of the chemiluminescence in alkaline solutions of several xanthene dyes with hydrogen peroxide was carried out in the hope of gaining some insight into the mechanism of the luminescent reaction. When the concentrations of sodium hydroxide and hydrogen peroxide were kept constant, the decay curve of the luminescence was represented by It=Aexp(−at), where It is the light intensity at time t ; a is equal to the rate constant of the decomposition of the dye (first order with respect to the dye concentration) and A is a parameter proportional to the initial dye concentration. The lifetime of the luminescent reaction was prolonged by the addition of such organic solvents as alcohol and dioxane; the a value decreased, while the A value remained unchanged. Both the a value and the A value increased with the elevation of the reaction temperature.

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