Add time:08/12/2019         Source:sciencedirect.com

The chemiluminescence (CL) arising from reaction of bis(2,4,6-trichlorophenyl)oxalate (TCPO) with hydrogen peroxide in the presence of a brightener 5-(3-anilino-5-chloroanilino)-2-{(E)-2-[4-(3-anilino-5-chloroanilino)-2-sulfophenyl]-1-ethenyl}-1-benzenesulfonic acid (Bri) has been studied. The relationship between the chemiluminescence intensity and concentrations of TCPO, sodium salicylate and hydrogen peroxide is reported. The chemiluminescence parameters including intensity at maximum CL, time at maximum intensity, total light yield and pseudo-first-order rate constants for the rise and fall of the CL burst (kr and kf) were evaluated from computer fitting of the resulting intensity–time plots. The activation parameters Ea, ΔH‡, ΔS‡ and ΔG‡ for the fall step were evaluated from the temperature dependence of kf values.

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