Determination of absolute chemiluminescence quantum yields for reactions of bis-(pentachlorophenyl) oxalate,hydrogen peroxide and fluorescent compounds

Absolute chemiluminescence quantum yields (?_CL) for reactions of bis-(pentachlorophenyl) oxalate (PCPO), hydrogen peroxide (H₂O₂) and 9:10 diphenyl anthracene (DPA) have been determined. A fully corrected chemiluminescence monitoring spectrometer was calibrated for spectral sensitivity using the chemiluminescence of the bis-(pentachlorophenyl) oxalate system as a liquid light source, the total photon output of which had previously been determined by chemical actinometry. At high (PCPO)/(H₂O₂) ratios ?_CL was found to be independent of PCPO and H₂O₂ concentrations.